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Document and Entity Information - USD ($)	12 Months Ended
Document and Entity Information - USD ($)	Dec. 31, 2012	Feb. 15, 2013	Jun. 29, 2012
Document Information
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	FY
Trading Symbol	MLM
Entity Registrant Name	MARTIN MARIETTA MATERIALS INC
Entity Central Index Key	0000916076
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		45,882,559
Entity Public Float			$ 1,675,436,621

Consolidated Statements of Earnings - USD ($) shares in Thousands	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net Sales	$ 1,838,723,000	$ 1,519,883,000	$ 1,475,638,000
Freight and delivery revenues	198,944,000	193,862,000	177,168,000
Total revenues	2,037,667,000	1,713,745,000	1,652,806,000
Cost of sales	1,512,807,000	1,217,911,000	1,153,987,000
Freight and delivery costs	198,944,000	193,862,000	177,168,000
Total cost of revenues	1,711,751,000	1,411,773,000	1,331,155,000
Gross Profit	325,916,000	301,972,000	321,651,000
Selling, general and administrative expenses	138,398,000	124,138,000	130,422,000
Business development costs	35,140,000	18,575,000	1,220,000
Other operating (income) and expenses, net	(2,575,000)	(1,720,000)	(8,298,000)
Earnings from Operations	154,953,000	160,979,000	198,307,000
Interest expense	53,339,000	58,586,000	68,440,000
Other nonoperating (income) and expenses, net	(1,299,000)	1,834,000	198,000
Earnings from continuing operations before taxes on income	102,913,000	100,559,000	129,669,000
Taxes on income	16,950,000	20,987,000	30,913,000
Earnings from Continuing Operations	85,963,000	79,572,000	98,756,000
(Loss) gain on discontinued operations, net of related tax (benefit) expense of $(320), $2,207 and $(1,570), respectively	(436,000)	4,001,000	(92,000)
Consolidated net earnings	85,527,000	83,573,000	98,664,000
Less: Net earnings attributable to noncontrolling interests	1,053,000	1,194,000	1,652,000
Net Earnings Attributable to Martin Marietta Materials, Inc.	84,474,000	82,379,000	97,012,000
Earnings from continuing operations	84,910,000	78,378,000	97,104,000
Discontinued operations	(436,000)	4,001,000	(92,000)
Net Earnings Attributable to Martin Marietta Materials, Inc.	$ 84,474,000	$ 82,379,000	$ 97,012,000
Per Common Share (See Note A)
Basic from continuing operations attributable to common shareholders	$ 1.84	$ 1.70	$ 2.11
Discontinued operations attributable to common shareholders	(0.01)	0.09
Earnings Per Share, Basic, Total	1.83	1.79	2.11
Diluted from continuing operations attributable to common shareholders	1.84	1.69	2.10
Discontinued operations attributable to common shareholders	(0.01)	0.09
Earnings Per Share, Diluted, Total	$ 1.83	$ 1.78	$ 2.10
Weighted-Average Common Shares Outstanding
Basic	45,828	45,652	45,485
Diluted	45,970	45,793	45,659

Consolidated Statements of Earnings (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
(Loss) gain on discontinued operations, related tax (benefit) expense	$ (320)	$ 2,207	$ (1,570)

- Definition

Tax effect allocated to a disposal group that is classified as a component of the entity reported as a separate component of income before extraordinary items. Includes the tax effects of the following: income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

+ References

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+ Details

Consolidated Statements of Comprehensive Earnings - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Consolidated net earnings	$ 85,527	$ 83,573	$ 98,664
Defined benefit pension and postretirement plans:
Net (loss) gain arising during period, net of tax of $(19,724), $(21,911) and $3,555, respectively	(30,147)	(39,544)	11,490
Prior service credit arising during period, net of tax of $0, $4,112 and $682, respectively		6,285	1,041
Amortization of prior service credit, net of tax of $(1,103), $(477) and $(458), respectively	(1,686)	(729)	(699)
Amortization of actuarial loss, net of tax of $4,799, $2,468 and $3,955, respectively	7,335	3,771	6,044
Amount recognized in net periodic pension cost due to settlement, net of tax of $308, $148 and $1,366, respectively	471	227	2,089
Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Including Portion Attributable To Noncontrolling Interest, Total	(24,027)	(29,990)	19,965
Foreign currency translation gain (loss), net of tax	1,081	(853)	912
Amortization of terminated value of forward starting interest rate swap agreements into interest expense, net of tax of $409, $381 and $355, respectively	625	582	543
Other Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest, Total	(22,321)	(30,261)	21,420
Consolidated comprehensive earnings	63,206	53,312	120,084
Less: Comprehensive earnings attributable to noncontrolling interests	1,011	1,163	1,648
Comprehensive Earnings Attributable to Martin Marietta Materials, Inc.	$ 62,195	$ 52,149	$ 118,436

Consolidated Statements of Comprehensive Earnings (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net (loss) gain arising during period, tax	$ (19,724)	$ (21,911)	$ 3,555
Prior service credit arising during period, tax	0	4,112	682
Amortization of prior service credit, tax	(1,103)	(477)	(458)
Amortization of actuarial loss, tax	4,799	2,468	3,955
Amount recognized in net periodic pension cost due to settlement, tax	308	148	1,366
Amortization of terminated value of forward starting interest rate swap agreements into interest expense, tax	$ 409	$ 381	$ 355

- Definition

Tax effect of the income statement impact of the reclassification adjustment for prior service costs recognized as a component of net period benefit cost.

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+ Details

- Definition

Tax effect of the (gain) loss adjustment to other comprehensive income (loss) resulting from the settlement or curtailment of the entity's defined benefit pension and other postretirement plans.

+ References

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+ Details

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2012	Dec. 31, 2011
Current Assets:
Cash and cash equivalents	$ 25,394	$ 26,022
Accounts receivable, net	224,050	203,748
Inventories, net	332,311	322,607
Current deferred income tax benefits	77,716	80,674
Other current assets	40,930	24,799
Total Current Assets	700,401	657,850
Property, plant and equipment, net	1,753,241	1,774,291
Goodwill	616,204	616,671
Other intangibles, net	50,433	54,133
Other noncurrent assets	40,647	44,877
Total Assets	3,160,926	3,147,822
Current Liabilities:
Accounts payable	83,537	92,210
Accrued salaries, benefits and payroll taxes	19,461	16,732
Pension and postretirement benefits	6,851	5,250
Accrued insurance and other taxes	28,682	26,408
Current maturities of long-term debt and short-term facilities	5,676	7,182
Other current liabilities	29,128	25,930
Total Current Liabilities	173,335	173,712
Long-term debt	1,042,183	1,052,902
Pension, postretirement and postemployment benefits	183,122	158,101
Noncurrent deferred income taxes	225,592	222,064
Other noncurrent liabilities	86,395	92,179
Total Liabilities	1,710,627	1,698,958
Equity:
Common stock ($0.01 par value; 100,000,000 shares authorized; 46,002,000 and 45,726,000 shares outstanding at December 31, 2012 and 2011, respectively)	459	456
Preferred stock ($0.01 par value; 10,000,000 shares authorized; no shares outstanding)
Additional paid-in capital	414,657	401,864
Accumulated other comprehensive loss	(106,169)	(83,890)
Retained earnings	1,101,598	1,090,891
Total Shareholders' Equity	1,410,545	1,409,321
Noncontrolling interests	39,754	39,543
Total Equity	1,450,299	1,448,864
Total Liabilities and Equity	$ 3,160,926	$ 3,147,822

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2012	Dec. 31, 2011
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares outstanding	46,002,000	45,726,000
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares outstanding

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash Flows from Operating Activities:
Consolidated net earnings	$ 85,527	$ 83,573	$ 98,664
Adjustments to reconcile consolidated net earnings to net cash provided by operating activities:
Depreciation, depletion and amortization	177,211	173,407	181,537
Stock-based compensation expense	7,781	11,522	14,675
Gains on divestitures and sales of assets	(956)	(15,494)	(4,492)
Deferred income taxes	13,929	11,324	935
Excess tax benefits from stock-based compensation transactions	(777)		(1,291)
Other items, net	2,073	1,598	4,629
Changes in operating assets and liabilities, net of effects of acquisitions and divestitures:
Accounts receivable, net	(20,302)	(19,375)	(20,546)
Inventories, net	(9,640)	(5,107)	1,241
Accounts payable	(8,673)	30,387	8,223
Other assets and liabilities, net	(23,484)	(12,741)	(13,767)
Net Cash Provided by Operating Activities	222,689	259,094	269,808
Cash Flows from Investing Activities:
Additions to property, plant and equipment	(151,023)	(155,363)	(135,916)
Acquisitions, net	(160)	(91,569)	(43,299)
Proceeds from divestitures and sales of assets	9,973	8,008	5,033
Loan to affiliate	(2,000)
Net Cash Used for Investing Activities	(143,210)	(238,924)	(174,182)
Cash Flows from Financing Activities:
Borrowings of long-term debt	181,000	495,000	200,000
Repayments of long-term debt	(193,655)	(470,450)	(419,680)
Debt issuance costs	(621)	(3,329)	(80)
Change in bank overdraft		(2,123)	386
Payments on capital lease obligations			(308)
Dividends paid	(73,767)	(73,648)	(73,550)
Distributions to owners of noncontrolling interests	(800)	(1,000)
Purchase of remaining interest in existing subsidiaries		(10,394)
Issuances of common stock	6,959	1,473	3,047
Excess tax benefits from stock-based compensation transactions	777		1,291
Net Cash Used for Financing Activities	(80,107)	(64,471)	(288,894)
Net Decrease in Cash and Cash Equivalents	(628)	(44,301)	(193,268)
Cash and Cash Equivalents, beginning of year	26,022	70,323	263,591
Cash and Cash Equivalents, end of year	25,394	26,022	70,323
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	53,039	60,740	68,135
Cash paid for income taxes	$ 12,826	$ 13,889	19,661
Rail Cars
Cash Flows from Investing Activities:
Railcar construction advances			(8,997)
Repayments of railcar construction advances			$ 8,997

Consolidated Statements of Total Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Earnings/ (Loss)	Retained Earnings	Total Shareholders' Equity	Noncontrolling Interests
Beginning Balance (in shares) at Dec. 31, 2009		45,399,000
Beginning Balance at Dec. 31, 2009	$ 1,406,411	$ 453	$ 381,173	$ (75,084)	$ 1,058,698	$ 1,365,240	$ 41,171
Consolidated net earnings	98,664				97,012	97,012	1,652
Other comprehensive earnings (loss)	21,420			21,424		21,424	(4)
Dividends declared	(73,550)				(73,550)	(73,550)
Issuances of common stock for stock award plans (in shares)		180,000
Issuances of common stock for stock award plans	639	$ 2	637			639
Stock-based compensation expense	14,675		14,675			14,675
Ending Balance (in shares) at Dec. 31, 2010		45,579,000
Ending Balance at Dec. 31, 2010	1,468,259	$ 455	396,485	(53,660)	1,082,160	1,425,440	42,819
Consolidated net earnings	83,573				82,379	82,379	1,194
Other comprehensive earnings (loss)	(30,261)			(30,230)		(30,230)	(31)
Dividends declared	(73,648)				(73,648)	(73,648)
Issuances of common stock for stock award plans (in shares)		147,000
Issuances of common stock for stock award plans	(2,405)	$ 1	(2,406)			(2,405)
Stock-based compensation expense	11,522		11,522			11,522
Distributions to owners of noncontrolling interests	(1,000)						(1,000)
Purchase of remaining interest in existing subsidiaries	$ (7,176)		(3,737)			(3,737)	(3,439)
Ending Balance (in shares) at Dec. 31, 2011	45,726,000	45,726,000
Ending Balance at Dec. 31, 2011	$ 1,448,864	$ 456	401,864	(83,890)	1,090,891	1,409,321	39,543
Consolidated net earnings	85,527				84,474	84,474	1,053
Other comprehensive earnings (loss)	(22,321)			(22,279)		(22,279)	(42)
Dividends declared	(73,767)				(73,767)	(73,767)
Issuances of common stock for stock award plans (in shares)		276,000
Issuances of common stock for stock award plans	5,015	$ 3	5,012			5,015
Stock-based compensation expense	7,781		7,781			7,781
Distributions to owners of noncontrolling interests	$ (800)						(800)
Ending Balance (in shares) at Dec. 31, 2012	46,002,000	46,002,000
Ending Balance at Dec. 31, 2012	$ 1,450,299	$ 459	$ 414,657	$ (106,169)	$ 1,101,598	$ 1,410,545	$ 39,754

Consolidated Statements of Total Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash dividends declared per common share	$ 1.60	$ 1.60	$ 1.60
Accumulated Other Comprehensive Earnings/ (Loss)
Cash dividends declared per common share	1.60	1.60	1.60
Total Shareholders' Equity
Cash dividends declared per common share	$ 1.60	$ 1.60	$ 1.60

Accounting Policies

12 Months Ended

Dec. 31, 2012

Accounting Policies

Note A: Accounting Policies

Organization. Martin Marietta Materials, Inc., (the “Corporation”) is engaged principally in the construction aggregates business. The Corporation’s aggregates product line accounts for 71% of consolidated 2012 net sales and includes crushed stone, sand and gravel, and is used primarily for construction of highways and other infrastructure projects, and in the nonresidential and residential construction industries. Aggregates products are also used in the railroad, environmental, utility and agricultural industries. These aggregates products, along with the asphalt products, ready mixed concrete and road paving materials of the Corporation’s vertically-integrated operations (which account for 18% of consolidated 2012 net sales), are sold and shipped from a network of 300 quarries, distribution facilities and plants to customers in 33 states, Canada, the Bahamas and the Caribbean Islands. As of December 31, 2012, the Aggregates business contains the following reportable segments: Mideast Group, Southeast Group and West Group. The Mideast Group operates in Indiana, Kentucky, Maryland, North Carolina, Ohio, Virginia and West Virginia. The Southeast Group has operations in Alabama, Florida, Georgia, Mississippi, South Carolina, Tennessee, Nova Scotia and the Bahamas. The West Group operates in Arkansas, Colorado, Iowa, Kansas, Louisiana, Minnesota, Missouri, Nebraska, Nevada, North Dakota, Oklahoma, Texas, Utah, Washington and Wyoming. The following states accounted for 57% of the Aggregates business’ 2012 net sales: Texas, North Carolina, Iowa, Colorado and Georgia.

In addition to the Aggregates business, the Corporation has a Specialty Products segment, accounting for 11% of consolidated 2012 net sales, that produces magnesia-based chemicals products used in industrial, agricultural and environmental applications and dolomitic lime sold primarily to customers in the steel industry.

Use of Estimates. The preparation of the Corporation’s consolidated financial statements in conformity with accounting principles generally accepted in the United States requires management to make certain estimates and assumptions about future events. These estimates and the underlying assumptions affect the amounts of assets and liabilities reported, disclosures about contingent assets and liabilities, and reported amounts of revenues and expenses. Such estimates include the valuation of accounts receivable, inventories, goodwill, intangible assets, and other long-lived assets, and assumptions used in the calculation of income taxes, retirement and other postemployment benefits. These estimates and assumptions are based on management’s best estimates and judgment. Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors, including the current economic environment. Management adjusts such estimates and assumptions when facts and circumstances dictate. Changes in credit, equity and energy markets and declines in construction activity increase the uncertainty inherent in certain of these estimates and assumptions. As future events and their effects cannot be determined with precision, actual results could differ significantly from these estimates. Changes in estimates, including those resulting from continuing changes in the economic environment, will be reflected in the financial statements for the period in which the change in estimate occurs.

Basis of Consolidation. The consolidated financial statements include the accounts of the Corporation and its wholly-owned and majority-owned subsidiaries. Partially-owned affiliates are either consolidated or accounted for at cost or as equity investments, depending on the level of ownership interest or the Corporation’s ability to exercise control over the affiliates’ operations. Intercompany balances and transactions have been eliminated in consolidation.

Revenue Recognition. Revenues for product sales are recognized when risks associated with ownership have passed to unaffiliated customers. Typically, this occurs when finished products are shipped. Revenues derived from the road paving business are recognized using the percentage completion method under the revenue-cost approach. Under the revenue-cost approach, the costs recognized are the total estimated contract costs multiplied by the percentage of completion. The contract revenue recognized is the total estimated contract revenues multiplied by the percentage of completion. Total revenues include sales of materials and services provided to customers, net of discounts or allowances, if any, and include freight and delivery costs billed to customers.

Freight and Delivery Costs. Freight and delivery costs represent pass-through transportation costs incurred and paid by the Corporation to third-party carriers to deliver products to customers. These costs are then billed to the Corporation’s customers.

Cash and Cash Equivalents. Cash equivalents are comprised of highly-liquid instruments with original maturities of three months or less from the date of purchase. The Corporation manages its cash and cash equivalents to ensure that short-term operating cash needs are met and that excess funds are managed efficiently. The Corporation subsidizes shortages in operating cash through short-term borrowing facilities. The Corporation typically invests excess funds in money market funds, money market demand deposit accounts or Eurodollar time deposit accounts. Money market demand deposits and Eurodollar time deposit accounts are exposed to bank solvency risk. Money market demand deposit accounts are FDIC insured up to $250,000. The Corporation’s deposits in bank funds generally exceed the $250,000 FDIC insurance limit. The Corporation’s cash management policy prohibits cash and cash equivalents over $100,000,000 to be maintained at any one bank.

In connection with its guarantee of an affiliate (see Note N), the Corporation is required to maintain funds in depository accounts at Fifth Third Bank (“Fifth Third”) in an amount greater than or equal to $5,000,000. Of the Corporation’s cash and cash equivalents at December 31, 2012 and 2011, $5,023,000 and $5,014,000, respectively, was on deposit at Fifth Third.

Customer Receivables. Customer receivables are stated at cost. The Corporation does not charge interest on customer accounts receivable. The Corporation records an allowance for doubtful accounts, which includes a provision for probable losses based on historical write offs and a specific reserve for accounts greater than $50,000 deemed at risk. The Corporation writes off customer receivables as bad debt expense when it becomes apparent based upon customer facts and circumstances that such amounts will not be collected.

Inventories Valuation. Inventories are stated at the lower of cost or market. Costs for finished products and in process inventories are determined by the first-in, first-out method. The Corporation records an allowance for finished product inventories in excess of sales for a twelve-month period, as measured by historical sales. The Corporation also establishes an allowance for expendable parts over five years old and supplies over one year old.

Post-production stripping costs, which represent costs of removing overburden and waste materials to access mineral deposits, are recorded as a component of inventory and recognized in cost of sales in the same period as the revenue from the sale of the inventory.

Properties and Depreciation. Property, plant and equipment are stated at cost. The estimated service lives for property, plant and equipment are as follows:


Class of Assets	Range of Service Lives

Buildings		4 to 50 years

Machinery & Equipment		2 to 35 years

Land Improvements		4 to 30 years

The Corporation begins capitalizing quarry development costs at a point when reserves are determined to be proven or probable, economically mineable and when demand supports investment in the market. Capitalization of these costs ceases when production commences. Quarry development costs are classified as land improvements.

The Corporation reviews relevant facts and circumstances to determine whether to capitalize or expense pre-production stripping costs when additional pits are developed within an existing quarry. If the additional pit operates in a separate and distinct area of the quarry, these costs are capitalized as quarry development costs and depreciated over the life of the uncovered reserves. Additionally, a separate asset retirement obligation is created for additional pits when the liability is incurred. Once a pit enters the production phase, all post-production stripping costs are expensed as incurred as periodic inventory production costs.

Mineral reserves and mineral interests, when acquired in connection with a business combination, are valued using an income approach over the life of the proven and probable reserves.

Depreciation is computed over estimated service lives, principally by the straight-line method. Depletion of mineral deposits is calculated over proven and probable reserves by the units-of-production method on a quarry-by-quarry basis.

Property, plant and equipment are reviewed for impairment whenever facts and circumstances indicate that the carrying amount of an asset may not be recoverable. An impairment loss is recognized if expected future undiscounted cash flows of the related asset are less than its carrying value.

Repair and Maintenance Costs. Repair and maintenance costs that do not substantially extend the life of the Corporation’s plant and equipment are expensed as incurred.

Goodwill and Intangible Assets. Goodwill represents the excess purchase price paid for acquired businesses over the estimated fair value of identifiable assets and liabilities. The carrying value of goodwill is reviewed annually, as of October 1, for impairment. An interim review is performed between annual tests if facts or circumstances indicate potential impairment. If an impairment review indicates that the carrying value is impaired, a charge is recorded.

The Corporation’s reporting units, which represent the level at which goodwill is tested for impairment, are based on its geographic regions. Goodwill is allocated to the reporting units based on the location of acquisitions and divestitures at the time of consummation.

Other intangibles represent amounts assigned principally to contractual agreements and are amortized ratably over periods based on related contractual terms. The carrying value of other intangibles is reviewed if facts and circumstances indicate potential impairment. If this review determines that the carrying value is impaired, a charge is recorded.

Retirement Plans and Postretirement Benefits. The Corporation sponsors defined benefit retirement plans and also provides other postretirement benefits. The Corporation recognizes the funded status, defined as the difference between the fair value of plan assets and the benefit obligation, of its pension plans and other postretirement benefits as an asset or liability on the consolidated balance sheets, with a corresponding adjustment to accumulated other comprehensive earnings or loss, net of tax. Actuarial gains or losses that arise during the year are not recognized as net periodic benefit cost in the same year, but rather are recognized as a component of accumulated other comprehensive earnings or loss. Those amounts are amortized over the participants’ average remaining service period and recognized as a component of net periodic benefit cost.

Stock-Based Compensation. The Corporation has stock-based compensation plans for employees and directors. The Corporation recognizes all forms of stock-based payments to employees, including stock options, as compensation expense. The compensation expense is the fair value of the awards at the measurement date and is recognized over the requisite service period.

The Corporation uses the accelerated expense recognition method for stock options. The accelerated recognition method requires stock options that vest ratably to be divided into tranches. The expense for each tranche is allocated to its particular vesting period.

The Corporation expenses the fair value of restricted stock awards, incentive compensation awards and directors’ fees paid in the form of common stock based on the closing price of the Corporation’s common stock on the awards’ respective grant dates.

The Corporation uses the lattice valuation model to determine the fair value of stock option awards. The lattice valuation model takes into account employees’ exercise patterns based on changes in the Corporation’s stock price and other variables. The period of time for which options are expected to be outstanding, or expected term of the option, is a derived output of the lattice valuation model. The Corporation considers the following factors when estimating the expected term of options: vesting period of the award, expected volatility of the underlying stock, employees’ ages and external data. Key assumptions used in determining the fair value of the stock options awarded in 2012, 2011 and 2010 were:


	2012	2011	2010
Risk-free interest rate	1.38%	2.82%	2.97%
Dividend yield	2.10%	1.90%	1.80%
Volatility factor	37.50%	36.70%	37.30%
Expected term	7.3 years	7.2 years	7.2 years

Based on these assumptions, the weighted-average fair value of each stock option granted was $22.18, $29.94 and $33.95 for 2012, 2011 and 2010, respectively.

The risk-free interest rate reflects the interest rate on zero-coupon U.S. government bonds available at the time each option was granted having a remaining life approximately equal to the option’s expected life. The dividend yield represents the dividend rate expected to be paid over the option’s expected life. The Corporation’s volatility factor measures the amount by which its stock price is expected to fluctuate during the expected life of the option and is based on historical stock price changes. Forfeitures are required to be estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates. The Corporation estimates forfeitures and will ultimately recognize compensation cost only for those stock-based awards that vest.

The Corporation recognizes income tax benefits received on dividends or dividend equivalents of unvested stock-based payments as an increase to additional paid-in capital and includes them in the pool of excess tax benefits.

Environmental Matters. The Corporation records a liability for an asset retirement obligation at fair value in the period in which it is incurred. The asset retirement obligation is recorded at the acquisition date of a long-lived tangible asset if the fair value can be reasonably estimated. A corresponding amount is capitalized as part of the asset’s carrying amount. The estimate of fair value is affected by management’s assumptions regarding the scope of the work required, inflation rates and quarry closure dates.

Further, the Corporation records an accrual for other environmental remediation liabilities in the period in which it is probable that a liability has been incurred and the appropriate amounts can be estimated reasonably. Such accruals are adjusted as further information develops or circumstances change. These costs are not discounted to their present value or offset for potential insurance or other claims or potential gains from future alternative uses for a site.

Income Taxes. Deferred income tax assets and liabilities on the consolidated balance sheets reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes, net of valuation allowances.

Uncertain Tax Positions. The Corporation recognizes a tax benefit when it is more-likely-than-not, based on the technical merits, that the position would be sustained upon examination by a taxing authority. The amount to be recognized is measured as the largest amount of tax benefit that is greater than 50 percent likely of being realized upon ultimate settlement with a taxing authority that has full knowledge of all relevant information. The Corporation’s unrecognized tax benefits are recorded in other current and other noncurrent liabilities, as appropriate, on the consolidated balance sheets.

The Corporation records interest accrued in relation to unrecognized tax benefits as income tax expense. Penalties, if incurred, are recorded as operating expenses in the consolidated statements of earnings.

Sales Taxes. Sales taxes collected from customers are recorded as liabilities until remitted to taxing authorities and therefore are not reflected in the consolidated statements of earnings.

Research and Development Costs. Research and development costs are charged to operations as incurred.

Start-Up Costs. Noncapital start-up costs for new facilities and products are charged to operations as incurred.

Warranties. The Corporation’s construction contracts contain warranty provisions covering defects in equipment, materials, design or workmanship that generally run from nine months to one year after project completion. Because of the nature of its projects, including contract owner inspections of the work both during construction and prior to acceptance, the Corporation has not experienced material warranty costs for these short-term warranties and therefore does not believe an accrual for these costs is necessary. Certain construction contracts carry longer warranty periods, ranging from two to ten years for which the Corporation has accrued an estimate of warranty cost. The warranty cost is estimated based on experience with the type of work and any known risks relative to the project and was not material for the years ended December 31, 2012, 2011 and 2010.

Consolidated Comprehensive Earnings and Accumulated Other Comprehensive Loss. Consolidated comprehensive earnings for the Corporation consist of consolidated net earnings; adjustments for the funded status of pension and postretirement benefit plans; foreign currency translation adjustments; and the amortization of the value of terminated forward starting interest rate swap agreements into interest expense.

The components of accumulated other comprehensive loss are as follows:


December 31 (add 000)	2012			2011			2010
Unrecognized actuarial losses, prior service costs and transition assets related to pension and postretirement benefits	$	(108,189	)	$	(84,204	)	$	(54,245	)
Foreign currency translation gains		6,157			5,076			5,929
Unamortized value of terminated forward starting interest rate swap agreements		(4,137	)		(4,762	)		(5,344	)

Accumulated other comprehensive loss	$	(106,169	)	$	(83,890	)	$	(53,660	)

The components of accumulated other comprehensive loss are net of cumulative noncurrent deferred tax assets as follows:


December 31 (add 000)	2012		2011		2010
Unrecognized actuarial losses, prior service costs and transition assets related to pension and postretirement benefits	$	70,881	$	55,161	$	39,501
Unamortized value of terminated forward starting interest rate swap agreements		2,707		3,116		3,497

Cumulative noncurrent deferred tax assets	$	73,588	$	58,277	$	42,998

Earnings Per Common Share. The Corporation computes earnings per share (“EPS”) pursuant to the two-class method. The two-class method determines EPS for each class of common stock and participating securities according to dividends or dividend equivalents and their respective participation rights in undistributed earnings. The Corporation pays nonforfeitable dividend equivalents during the vesting period on its restricted stock awards and incentive stock awards, which results in these being considered participating securities.

The numerator for basic and diluted earnings per common share is net earnings attributable to Martin Marietta Materials, Inc., reduced by dividends and undistributed earnings attributable to the Corporation’s unvested restricted stock awards and incentive stock awards. The denominator for basic earnings per common share is the weighted-average number of common shares outstanding during the period. Diluted earnings per common share are computed assuming that the weighted-average number of common shares is increased by the conversion, using the treasury stock method, of awards to be issued to employees and nonemployee members of the Corporation’s Board of Directors under certain stock-based compensation arrangements if the conversion is dilutive. The diluted per-share computations reflect a change in the number of common shares outstanding (the denominator) to include the number of additional shares that would have been outstanding if the potentially dilutive common shares had been issued.

The following table reconciles the numerator and denominator for basic and diluted earnings per common share:


years ended December 31 (add 000)	2012			2011			2010
Net earnings from continuing operations attributable to Martin Marietta Materials, Inc.	$	84,910		$	78,378		$	97,104
Less: Distributed and undistributed earnings attributable to unvested awards		(500	)		(657	)		(993	)

Basic and diluted net earnings attributable to common shareholders from continuing operations attributable to Martin Marietta Materials, Inc.		84,410			77,721			96,111
Basic and diluted net (loss) earnings attributable to common shareholders from discontinued operations		(436	)		4,001			(92	)

Basic and diluted net earnings attributable to common shareholders attributable to Martin Marietta Materials, Inc.	$	83,974		$	81,722		$	96,019


Basic weighted-average common shares outstanding		45,828			45,652			45,485
Effect of dilutive employee and director awards		142			141			174

Diluted weighted-average common shares outstanding		45,970			45,793			45,659

Accounting Changes. Effective January 1, 2012, as required by accounting guidance, the Corporation changed its presentation of consolidated comprehensive earnings/loss. The Corporation no longer reports consolidated comprehensive earnings/loss and related components of other comprehensive earnings/loss in its consolidated statements of total equity. Rather, the Corporation presents consolidated comprehensive earnings/loss in a separate consolidated statement of comprehensive earnings for annual periods. Prior-year information has been recast to conform to this presentation approach.

Goodwill and Intangible Assets

12 Months Ended

Dec. 31, 2012

Goodwill and Intangible Assets

Note B: Goodwill and Intangible Assets

The following table shows the changes in goodwill, all of which relate to the Aggregates business, by reportable segment and in total:



years ended December 31	Mideast Group			Southeast Group			West Group			Total

(add 000)	2012

Balance at beginning of period	$	122,052		$	72,073		$	422,546		$	616,671
Adjustments to purchase price allocations		---			---			(467	)		(467)
District reorganization		(9,229	)		9,229			---			---

Balance at end of period	$	112,823		$	81,302		$	422,079		$	616,204


	2011

Balance at beginning of period	$	122,052		$	105,870		$	398,605		$	626,527
Acquisitions		---			---			23,941			23,941
Amounts allocated to divestitures		---			(33,797	)		---			(33,797)

Balance at end of period	$	122,052		$	72,073		$	422,546		$	616,671

In 2011, the Corporation closed three aggregates-related acquisitions for which it recognized $23,941,000 of goodwill. Additionally, in 2011, the Corporation divested of its River District operations as part of an asset exchange. Goodwill of $33,797,000 associated with this divestiture was written off.

Intangible assets subject to amortization consist of the following:


December 31	Gross Amount		Accumulated Amortization			Net Balance
(add 000)	2012
Noncompetition agreements	$	6,560	$	(5,476	)	$	1,084
Customer relationships		20,160		(4,100	)		16,060
Use rights and other		15,865		(6,416	)		9,449
Total	$	42,585	$	(15,992	)	$	26,593

	2011
Noncompetition agreements	$	6,984	$	(5,447	)	$	1,537
Customer relationships		20,160		(2,070	)		18,090
Use rights and other		15,865		(5,307	)		10,558
Total	$	43,009	$	(12,824	)	$	30,185

Intangible assets deemed to have an indefinite life and not being amortized consist of the following:


December 31	Aggregates Business		Specialty Products		Total
(add 000)	2012
Use rights	$	21,275	$	--	$	21,275
Trade name		--		2,565		2,565
Total	$	21,275	$	2,565	$	23,840

	2011
Use rights	$	21,383	$	--	$	21,383
Trade name		--		2,565		2,565
Total	$	21,383	$	2,565	$	23,948

The Corporation did not acquire any intangibles in 2012. During 2011, the Corporation acquired $38,783,000 of other intangibles for its Aggregates business, consisting of the following:


	Amount		Weighted-average amortization period
(add 000)	2011
Subject to amortization:
Noncompetition agreements	$	180	7.0 years
Customer relationships		16,610	11.6 years
Use rights and other		7,410	19.5 years
		24,200	14.0 years

Not subject to amortization:
Use rights		14,583	N/A
Total	$	38,783

Total amortization expense for intangible assets for the years ended December 31, 2012, 2011 and 2010 was $3,593,000, $1,812,000 and $1,453,000, respectively.

The estimated amortization expense for intangible assets for each of the next five years and thereafter is as follows:


(add 000)
2013	$	3,508
2014		3,214
2015		2,568
2016		2,337
2017		2,211
Thereafter		12,755
Total	$	26,593

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References + Details

Business Combinations and Discontinued Operations

12 Months Ended

Dec. 31, 2012

Business Combinations and Discontinued Operations

Note C: Business Combinations and Discontinued Operations

Business Combinations. The Corporation completed several acquisitions in 2011 and 2010 that were not financially material business combinations. In 2011, the Corporation paid $91,569,000 for acquisitions in the metropolitan Denver, Colorado region and San Antonio, Texas. These acquisitions included aggregates quarry sites and downstream ready mixed concrete, asphalt and road paving businesses. In 2010, the Corporation paid $43,299,000 for an aggregates distribution facility at Port Canaveral, Florida and a sand and gravel business near Charlotte, North Carolina.

Divestitures and Permanent Closures. Divestitures and permanent closures of underperforming operations of the Aggregates business represent discontinued operations, and, therefore, the results of their operations through the dates of disposal and any gain or loss on disposals are included in discontinued operations in the consolidated statements of earnings. The results of operations for divestitures do not include Corporate overhead that was allocated during the periods the Corporation owned these operations.

Discontinued operations consist of the following:


years ended December 31
(add 000)	2012			2011			2010
Net sales	$	53		$	64,645		$	75,493

Pretax loss on operations	$	(402	)	$	(3,778	)	$	(1,658	)
Pretax (loss) gain on disposals		(354	)		9,986			(4	)
Pretax (loss) gain		(756	)		6,208			(1,662	)
Income tax (benefit) expense		(320	)		2,207			(1,570	)
Net (loss) earnings	$	(436	)	$	4,001		$	(92	)

In 2011, the Corporation divested its River District operations, which was part of the Southeast Group.

Accounts Receivable, Net

12 Months Ended

Dec. 31, 2012

Accounts Receivable, Net

Note D: Accounts Receivable, Net


December 31
(add 000)	2012			2011
Customer receivables	$	226,577		$	197,611
Other current receivables		3,542			11,432
		230,119			209,043
Less allowances		(6,069	)		(5,295	)
Total	$	224,050		$	203,748

Inventories, Net

12 Months Ended

Dec. 31, 2012

Inventories, Net

Note E: Inventories, Net


December 31
(add 000)	2012			2011
Finished products	$	355,881		$	350,685
Products in process and raw materials		16,442			11,116
Supplies and expendable parts		56,805			53,287
		429,128			415,088
Less allowances		(96,817	)		(92,481	)
Total	$	332,311		$	322,607

Property, Plant and Equipment, Net

12 Months Ended

Dec. 31, 2012

Property, Plant and Equipment, Net

Note F: Property, Plant and Equipment, Net


December 31
(add 000)	2012			2011
Land and land improvements	$	645,095		$	620,940
Mineral reserves and interests		430,884			421,820
Buildings		116,332			111,796
Machinery and equipment		2,511,222			2,407,045
Construction in progress		109,054			127,091
		3,812,587			3,688,692
Less allowances for depreciation, depletion and amortization		(2,059,346	)		(1,914,401	)
Total	$	1,753,241		$	1,774,291

Depreciation, depletion and amortization expense related to property, plant and equipment was $171,940,000, $169,974,000 and $178,426,000 for the years ended December 31, 2012, 2011 and 2010, respectively.

Interest cost of $2,537,000, $1,816,000 and $2,129,000 was capitalized during 2012, 2011 and 2010, respectively.

At December 31, 2012 and 2011, $69,073,000 and $72,181,000, respectively, of the Aggregate business’ net fixed assets were located in foreign countries, namely the Bahamas and Canada.

- Definition

The entire disclosure for long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. This disclosure may include property plant and equipment accounting policies and methodology, a schedule of property, plant and equipment gross, additions, deletions, transfers and other changes, depreciation, depletion and amortization expense, net, accumulated depreciation, depletion and amortization expense and useful lives, income statement disclosures, assets held for sale and public utility disclosures.

+ References + Details

Long-Term Debt

12 Months Ended

Dec. 31, 2012

Long-Term Debt

Note G: Long-Term Debt


December 31
(add 000)	2012			2011
6.6% Senior Notes, due 2018	$	298,677		$	298,476
7% Debentures, due 2025		124,443			124,417
6.25% Senior Notes, due 2037		228,114			247,915
Term Loan Facility, due 2015, interest rate of 2.21% and 2.20% at December 31, 2012 and 2011, respectively		245,000			250,000
Revolving Facility, interest rate of 1.91% and 2.64% at December 31, 2012 and 2011, respectively		50,000			35,000
AR Credit Facility, interest rate of 1.00% and 1.66% at December 31, 2012 and 2011, respectively		100,000			100,000
Other notes		1,625			4,276
Total		1,047,859			1,060,084
Less current maturities		(5,676	)		(7,182	)
Long-term debt	$	1,042,183		$	1,052,902

The Corporation has a Credit Agreement with JPMorgan Chase Bank, N.A., as Administrative Agent, Wells Fargo Bank, N.A., Branch Banking and Trust Company, SunTrust Bank, and Bank of America, N.A., as Co-Syndication Agents, and the lenders party thereto (the “Credit Agreement”), consisting of a $250,000,000 senior unsecured term loan (the “Term Loan Facility”) and a $350,000,000 four-year senior unsecured revolving facility (the “Revolving Facility”, and together with the Term Loan Facility, the “Senior Unsecured Credit Facilities”). The Senior Unsecured Credit Facilities are syndicated with the following banks:


(add 000) Lender	Revolving Facility Commitment		Term Loan Facility Commitment
JPMorgan Chase Bank, N.A.	$	46,667	$	33,333
Wells Fargo Bank, N.A.		46,667		33,333
SunTrust Bank		46,667		33,333
Branch Banking and Trust Company		46,667		33,333
Bank of America, N.A.		46,667		33,333
Citibank, N.A.		29,167		20,833
Deutsche Bank AG New York Branch		29,167		20,833
The Northern Trust Company		29,167		20,833
Comerica Bank		14,582		10,418
Regions Bank		14,582		10,418

Total	$	350,000	$	250,000

Borrowings under the Senior Unsecured Credit Facilities bear interest, at the Corporation’s option, at rates based upon LIBOR or a base rate, plus, for each rate, a margin determined in accordance with a ratings-based pricing grid. The base rate is defined as the highest of (i) JPMorgan Chase Bank N.A.’s prime lending rate, (ii) the federal funds rate plus 0.5% or (iii) one-month LIBOR plus 1%.

The Revolving Facility expires on March 31, 2015, with any outstanding principal amounts, together with interest accrued thereon, due in full on that date.

The Corporation is required to make annual principal payments of $5,000,000 on its Term Loan Facility, with the remaining outstanding principal, together with interest accrued thereon, due in full on March 31, 2015.

The Corporation has a $100,000,000 secured accounts receivable credit facility (the “AR Credit Facility”) with Wells Fargo Bank, N.A. Borrowings under the AR Credit Facility bear interest at a rate equal to the one-month LIBOR plus 0.75%. Borrowings under the AR Credit Facility are limited based on the balance of the Corporation’s accounts receivable. The AR Credit Facility matures on April 20, 2013. At December 31, 2012, outstanding borrowings of $100,000,000 were classified as long-term on the consolidated balance sheet as the Corporation has the ability and intent to renew the Credit Facility or refinance amounts outstanding with borrowings that mature in more than twelve months.

On January 23, 2012, the Corporation repurchased $20,000,000 par value of its outstanding 6.25% Senior Notes due 2037 at 90.75 with borrowings under the Revolving Facility.

The Corporation’s 6.6% Senior Notes due 2018 and 6.25% Senior Notes due 2037 (collectively, the “Senior Notes”) are senior unsecured obligations of the Corporation, ranking equal in right of payment with the Corporation’s existing and future unsubordinated indebtedness. Upon a change of control repurchase event and a resulting below-investment-grade credit rating, the Corporation would be required to make an offer to repurchase all outstanding Senior Notes at a price in cash equal to 101% of the principal amount of the Senior Notes, plus any accrued and unpaid interest to, but not including, the purchase date.

All Debentures and Senior Notes are carried net of original issue discount, which is being amortized by the effective interest method over the life of the issue. Senior Notes are redeemable prior to their respective maturity dates. The principal amount, effective interest rate and maturity date for the Corporation’s Debentures and Senior Notes are as follows:


	Principal Amount (add 000)		Effective Interest Rate	Maturity Date
6.6% Senior Notes	$	300,000	6.81%	April 15, 2018
7% Debentures	$	125,000	7.12%	December 1, 2025
6.25% Senior Notes	$	230,000	6.45%	May 1, 2037

The Corporation’s Credit Agreement and AR Credit Facility require the Corporation’s ratio of consolidated debt to consolidated earnings before interest, taxes, depreciation, depletion and amortization (EBITDA), as defined, for the trailing twelve months (the “Ratio”) to not exceed 3.50x as of the end of any fiscal quarter, provided that the Corporation may exclude from the Ratio debt incurred in connection with certain acquisitions for a period of 180 days so long as the Corporation maintains specified ratings on its long-term unsecured debt and the Ratio calculated without such exclusion does not exceed 3.75x. Additionally, if no amounts are outstanding under both the Revolving Facility and the AR Credit Facility, consolidated debt, including debt guaranteed by the Corporation, may be reduced by the Corporation’s unrestricted cash and cash equivalents in excess of $50,000,000, such reduction not to exceed $200,000,000, for purposes of the covenant calculation.

In order to provide incremental liquidity cushion, during 2012, the Corporation amended the Credit Agreement Ratio. The amendment temporarily increases the maximum Ratio to 3.75x at December 31, 2012, March 31, 2013 and June 30, 2013. The Ratio returns to the pre-amendment maximum of 3.50x for the September 30, 2013 calculation date. The Corporation was in compliance with the Ratio at December 31, 2012.

Available borrowings under the Revolving Facility are reduced by any outstanding letters of credit issued by the Corporation under the Revolving Facility. At December 31, 2012 and 2011, the Corporation had $2,507,000 and $1,963,000, respectively, of outstanding letters of credit issued under the Revolving Facility. The Corporation paid an upfront loan commitment fee to the bank group that is being amortized over the life of the Revolving Facility. Unused fees are paid on undrawn revolving balances.

The Corporation has a $10,000,000 short-term line of credit. No amounts were outstanding under this line of credit at December 31, 2012 or 2011.

The Corporation’s long-term debt maturities for the five years following December 31, 2012, and thereafter are:


(add 000)
2013	$	5,676
2014		5,229
2015		385,207
2016		145
2017		47
Thereafter		651,555
Total	$	1,047,859

Accumulated other comprehensive loss includes the unamortized value of terminated forward starting interest rate swap agreements. For the years ended December 31, 2012, 2011 and 2010, the Corporation recognized $1,034,000, $963,000 and $898,000, respectively, as additional interest expense. The ongoing amortization of the terminated value of the forward starting interest rate swap agreements will increase annual interest expense by approximately $1,000,000 until the maturity of the 6.6% Senior Notes in 2018.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References + Details

Financial Instruments

12 Months Ended

Dec. 31, 2012

Financial Instruments

Note H: Financial Instruments

The Corporation’s financial instruments include temporary cash investments, accounts receivable, notes receivable, bank overdraft, publicly-registered long-term notes, debentures and other long-term debt.

Temporary cash investments are placed primarily in money market funds, money market demand deposit accounts and Eurodollar time deposits with the following financial institutions: Bank of America, N.A., Branch Banking and Trust Company, JPMorgan Chase Bank, N.A., Regions Bank, Fifth Third and Wells Fargo Bank, N.A. The Corporation’s cash equivalents have maturities of less than three months. Due to the short maturity of these investments, they are carried on the consolidated balance sheets at cost, which approximates fair value.

Customer receivables are due from a large number of customers, primarily in the construction industry, and are dispersed across wide geographic and economic regions. However, customer receivables are more heavily concentrated in certain states (see Note A). The estimated fair values of customer receivables approximate their carrying amounts.

Notes receivable are primarily related to divestitures and are not publicly traded. However, using current market interest rates, but excluding adjustments for credit worthiness, if any, management estimates that the fair value of notes receivable approximates its carrying amount.

The bank overdraft represents the float of outstanding checks. The estimated fair value of the bank overdraft approximates its carrying value.

The carrying values and fair values of the Corporation’s long-term debt were $1,047,859,000 and $1,105,650,000, respectively, at December 31, 2012 and $1,060,084,000 and $1,087,726,000, respectively, at December 31, 2011. The estimated fair value of the Corporation’s publicly-registered long-term debt was estimated based on level 1 of the fair value hierarchy, quoted market prices. The estimated fair values of other borrowings, which primarily represent variable-rate debt, approximate their carrying amounts.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 30
-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13537-108611

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14064-108612

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 16
-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13504-108611

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13433-108611

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15B
-Subparagraph a, b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44A, 44B
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 159
-Paragraph 17-22, 27, 28
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15A
-Subparagraph a-d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15C, 15D
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 32, 33, 34
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 3, 10, 14, 15
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Income Taxes

12 Months Ended

Dec. 31, 2012

Income Taxes

Note I: Income Taxes

The components of the Corporation’s tax expense (benefit) on income from continuing operations are as follows:


years ended December 31
(add 000)	2012			2011			2010
Federal income taxes:
Current	$	(2,926	)	$	15,968		$	10,534
Deferred		12,581			4,080			14,779
Total federal income taxes		9,655			20,048			25,313
State income taxes:
Current		373			2,827			1,988
Deferred		1,670			(882	)		3,429
Total state income taxes		2,043			1,945			5,417
Foreign income taxes:
Current		4,062			(1,006	)		(260	)
Deferred		1,190			--			443
Total foreign income taxes		5,252			(1,006	)		183
Total taxes on income	$	16,950		$	20,987		$	30,913

For the year ended December 31, 2012, the current federal tax benefit is primarily attributable to the estimated settlement of the Advanced Pricing Agreement (“APA”) between the United States and Canadian taxing authorities for intercompany shipments during the years 2007 to 2011, and a refund related to the 2006 tax year.

For the years ended December 31, 2012 and 2010, excess tax benefits attributable to stock-based compensation transactions that were recorded to shareholders’ equity amounted to $777,000 and $1,291,000, respectively. For the year ended December 31, 2011, the realized tax benefit for stock-based compensation transactions was less than the amounts estimated during the vesting periods. As a result, the Corporation reduced its pool of excess tax benefits by $966,000.

For the years ended December 31, 2012, 2011 and 2010, foreign pretax loss was $5,473,000, $12,897,000 and $2,410,000, respectively. In 2012, the current foreign tax expense primarily relates to the estimated settlement of the APA between the United States and Canadian taxing authorities offset by the reversal of the valuation allowance on deferred tax assets. In 2011, the current foreign tax benefit included refunds for the double taxation resulting from the Canadian Revenue Authority’s audit of the Canadian subsidiary. Any tax effect of currency translations included in foreign taxes was immaterial.

The Corporation’s effective income tax rate on continuing operations varied from the statutory United States income tax rate because of the following permanent tax differences:


years ended December 31	2012			2011			2010
Statutory tax rate		35.0	%		35.0	%		35.0	%
Increase (reduction) resulting from:
Effect of statutory depletion		(17.8	)		(17.5	)		(12.8	)
State income taxes		1.3			1.3			2.7
Foreign valuation allowance		(3.4	)		2.6			0.8
Foreign taxes, other		0.5			0.8			(0.2	)
Domestic production deduction		0.1			(1.6	)		(1.6	)
Advanced pricing agreement		1.0			--			--
Medicare subsidy		(0.1	)		0.2			1.8
Other items		(0.1	)		0.1			(1.9	)

Effective income tax rate		16.5	%		20.9	%		23.8	%

For income tax purposes, the statutory depletion deduction is calculated as a percentage of sales, subject to certain limitations. Due to these limitations, changes in sales volumes and earnings may not proportionately affect the Corporation’s effective income tax rate on continuing operations.

The settlement of the APA will allow the Corporation to utilize certain net operating loss and tax credit carryforwards for which a valuation allowance was previously established. Accordingly, the Corporation reversed a $3,644,000 valuation allowance in 2012. The Corporation increased its valuation allowance attributable to net operating loss carryforwards of its wholly-owned Canadian subsidiary by $2,680,000 in 2011.

No deferred tax asset was recognized on the loss of the Corporation’s wholly-owned Bahamas subsidiary in 2012 and 2011 since the tax benefit is not expected to reverse in the foreseeable future.

The Corporation is entitled to receive a nine percent tax deduction related to income from domestic (i.e., United States) production activities. For 2012, no deduction was allowed due to the taxable income limitation. The deduction reduced income tax expense and increased net earnings by $2,035,000, or $0.04 per diluted share, in 2011 and $1,696,000, or $0.04 per diluted share, in 2010.

In 2010, the Patient Protection and Affordable Care Act reduced the tax benefits available to an employer that receives the Medicare Part D subsidy. In 2012, the Corporation does not qualify for the subsidy.

During 2012, 2011 and 2010, several states in which the Corporation operates enacted changes to tax rates which were determined to be immaterial to the overall effective income tax rate.

The principal components of the Corporation’s deferred tax assets and liabilities are as follows:


December 31	Deferred Assets (Liabilities)
(add 000)	2012			2011
Deferred tax assets related to:
Employee benefits	$	33,258		$	37,903
Inventories		54,555			60,462
Valuation and other reserves		17,752			14,882
Net operating loss carryforwards		8,891			10,835
Other items, net		1,511			--

Gross deferred tax assets		115,967			124,082
Valuation allowance on deferred tax assets		(6,572	)		(9,402	)

Total net deferred tax assets		109,395			114,680

Deferred tax liabilities related to:
Property, plant and equipment		(260,190	)		(258,433	)
Goodwill and other intangibles		(70,669	)		(54,782	)
Other items, net		--			(1,132	)

Total deferred tax liabilities		(330,859	)		(314,347	)

Net deferred tax liability	$	(221,464	)	$	(199,667	)

Additionally, the Corporation had net deferred tax assets of $73,588,000 and $58,277,000 for certain items recorded in accumulated other comprehensive loss at December 31, 2012 and 2011, respectively.

The Corporation’s deferred tax assets and (liabilities) are recognized on the consolidated balance sheets as follows:


December 31
(add 000)	2012			2011
Current deferred income tax benefits	$	77,716		$	80,674
Noncurrent deferred income taxes		(225,592	)		(222,064	)

Net deferred income taxes	$	(147,876	)	$	(141,390	)

Deferred tax assets for employee benefits result from the temporary differences between the deductions for pension and postretirement obligations and stock-based compensation transactions. For financial reporting purposes, such amounts are expensed based on authoritative accounting guidance. For income tax purposes, amounts related to pension and postretirement obligations are deductible as funded. Amounts related to stock-based compensation transactions are deductible for income tax purposes upon vesting or exercise of the underlying award. A deferred tax asset is carried on stock options that had exercise prices that exceeded the Corporation’s stock price at December 31, 2012. If these options expire without being exercised, the deferred tax assets are written off by reducing the pool of excess tax benefits to the extent available and expensing any excess.

Deferred tax liabilities for property, plant and equipment result from accelerated depreciation methods being used for income tax purposes as compared with the straight-line method for financial reporting purposes.

Deferred tax liabilities related to goodwill and other intangibles reflect the cessation of goodwill amortization for financial reporting purposes, while amortization continues for income tax purposes.

The Corporation had domestic and foreign net operating loss carryforwards of $179,029,000 and $140,738,000 at December 31, 2012 and 2011, respectively. These carryforwards have various expiration dates through 2032. At December 31, 2012 and 2011, the deferred tax assets associated with these carryforwards were $8,891,000 and $10,835,000, respectively, for which valuation allowances of $5,185,000 and $8,846,000, respectively, were recorded. The Corporation also had domestic and foreign tax credit carryforwards of $10,124,000 and $3,761,000 at December 31, 2012 and 2011, respectively, for which valuation allowances were recorded in the amount of $1,387,000 and $556,000 at December 31, 2012 and 2011, respectively. Alternative Minimum Tax credits of $6,295,000 have an indefinite life. All other domestic and foreign tax credits have various expiration dates through 2018 and 2031, respectively.

The Corporation provides deferred taxes, as required, on the undistributed net earnings of all non-U.S. subsidiaries for which the indefinite reversal criterion has not been met. The Corporation expects to reinvest permanently the earnings from its wholly-owned Canadian subsidiary and accordingly, has not provided deferred taxes on the subsidiary’s undistributed net earnings. As a result of the estimated settlement of the APA, the Canadian subsidiary’s undistributed net earnings have been materially impacted. Management estimates the undistributed net earnings to be approximately $23,400,000. The determination of the unrecognized deferred tax liability for temporary differences related to the investment of the wholly-owned Canadian subsidiary is not practicable due to the complexities associated with the calculation of a hypothetical tax liability payable upon the repatriation of earnings.

The following table summarizes the Corporation’s unrecognized tax benefits, excluding interest and correlative effects:


years ended December 31 (add 000)	2012			2011			2010
Unrecognized tax benefits at beginning of year	$	9,288		$	11,011		$	16,722
Gross increases – tax positions in prior years		19,434			1,217			19,619
Gross decreases – tax positions in prior years		(13,876	)		(1,510	)		(3,258	)
Gross increases – tax positions in current year		1,555			6,274			6,462
Gross decreases – tax positions in current year		--			(4,625	)		(5,135	)
Settlements with taxing authorities		(1,021	)		(3,079	)		(12,573	)
Lapse of statute of limitations		--			--			(10,826	)

Unrecognized tax benefits at end of year	$	15,380		$	9,288		$	11,011

At December 31, 2012 and 2011, unrecognized tax benefits of $14,386,000 and $4,915,000, respectively, related to interest accruals and permanent income tax differences net of federal tax benefits, would have favorably affected the Corporation’s effective income tax rate if recognized.

Unrecognized tax benefits are reversed as a discrete event if an examination of applicable tax returns is not begun by a federal or state tax authority within the statute of limitations or upon effective settlement with federal or state tax authorities. Management believes its accrual for unrecognized tax benefits is sufficient to cover uncertain tax positions reviewed during audits by taxing authorities. The Corporation’s open tax years that are subject to federal examination are 2008 through 2012. The Corporation anticipates that it is reasonably possible that its unrecognized tax benefits may decrease up to $9,834,000, excluding indirect benefits, during the twelve months ending December 31, 2013 due to the expected settlement of the APA with the taxing authorities and the expiration of the statute of limitations for the 2009 tax year.

For the year ended December 31, 2012, gross increases in tax positions in prior years included the estimated effect of the APA that increased the sales price charged for intercompany shipments during the years 2007 through 2011. Upon final settlement, the Corporation will be allowed a corresponding refund of tax in the United States for the years 2007 through 2011, which is not included in unrecognized tax benefits at December 31, 2012.

For the year ended December 31, 2012, $1,617,000, or $0.04 per diluted share, was reversed into income resulting from a refund of federal tax and interest related to the 2006 tax year and the estimated effects of the APA. For the year ended December 31, 2011, $3,010,000, or $0.07 per diluted share, was reversed into income upon the favorable effective settlement of the Internal Revenue Service audit for the 2008 tax year. For the year ended December 31, 2010, $5,571,000, or $0.12 per diluted share, was reversed into income upon the effective settlement of issues related to the 2004 and 2005 tax years, the effective settlement of the IRS audit for the 2007 tax year and the expiration of the statute of limitations for federal examination of the 2006 tax year.

For the years ended December 31, 2012, 2011 and 2010, total interest, net of tax, included in income tax expense in the consolidated statements of earnings was $119,000, $305,000 and $1,327,000, respectively. At December 31, 2012, accrued interest of $156,000, net of tax benefits of $102,000, was recorded as a noncurrent liability on the Corporation’s consolidated balance sheet; and accrued interest of $179,000, for which there is no related tax benefit, was recorded as a current liability. At December 31, 2011, accrued interest of $220,000, net of tax benefits of $144,000, was recorded as a noncurrent liability on the Corporation’s consolidated balance sheet; and accrued interest of $54,000, net of tax benefits of $35,000, was recorded as a current liability.

On December 23, 2011, the U.S. Treasury Department issued comprehensive temporary and proposed regulations addressing the treatment of expenditures related to tangible property for tax purposes. On March 7, 2012, the IRS issued two revenue procedures containing administrative guidance related to the adoption of the new rules. The IRS granted taxpayers administrative relief and audit protection for a two-year period. In 2012, the effective date of the regulations was extended to tax years beginning January 1, 2014. Management has begun to evaluate the changes necessary to comply with the regulations and the related administrative procedures and is not currently aware of any adjustments that would be material to the Corporation’s consolidated financial position and results of operations. As part of its compliance with these regulations, the Corporation reversed its unrecognized tax benefits related to repairs and maintenance as of March 31, 2012.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

+ Details

Retirement Plans, Postretirement and Postemployment Benefits

12 Months Ended

Dec. 31, 2012

Retirement Plans, Postretirement and Postemployment Benefits

Note J: Retirement Plans, Postretirement and Postemployment Benefits

The Corporation sponsors defined benefit retirement plans that cover substantially all employees. Additionally, the Corporation provides other postretirement benefits for certain employees, including medical benefits for retirees and their spouses, Medicare Part B reimbursement and retiree life insurance. The Corporation also provides certain benefits, such as workers’ compensation and disability benefits, to former or inactive employees after employment but before retirement.

The measurement date for the Corporation’s defined benefit plans, postretirement benefit plans and postemployment benefit plans is December 31.

Defined Benefit Retirement Plans. The assets of the Corporation’s retirement plans are held in the Corporation’s Master Retirement Trust and are invested in listed stocks, bonds, hedge funds, real estate and cash equivalents. Defined retirement benefits for salaried employees are based on each employee’s years of service and average compensation for a specified period of time before retirement. Defined retirement benefits for hourly employees are generally stated amounts for specified periods of service.

The Corporation sponsors a Supplemental Excess Retirement Plan (“SERP”) that generally provides for the payment of retirement benefits in excess of allowable Internal Revenue Code limits. The SERP generally provides for a lump-sum payment of vested benefits. When these benefits payments exceed the sum of the service and interest costs for the SERP during a year, the Corporation recognizes a pro-rata portion of the SERP’s unrecognized actuarial loss as settlement expense.

The net periodic retirement benefit cost of defined benefit plans includes the following components:

years ended December 31


(add 000)	2012			2011			2010
Components of net periodic benefit cost:
Service cost	$	13,084		$	11,270		$	11,056
Interest cost		23,653			23,178			22,588
Expected return on assets		(23,899	)		(24,493	)		(21,041	)
Amortization of:
Prior service cost		466			534			583
Actuarial loss		12,417			6,324			9,986
Transition asset		(1	)		(1	)		(1	)
Settlement charge		779			375			3,455

Net periodic benefit cost	$	26,499		$	17,187		$	26,626

The Corporation recognized the following amounts in consolidated comprehensive earnings:

years ended December 31


(add 000)	2012			2011			2010
Actuarial loss (gain)	$	47,877		$	65,334		$	(10,915	)
Amortization of:
Prior service cost		(466	)		(534	)		(583	)
Actuarial loss		(12,417	)		(6,324	)		(9,986	)
Transition asset		1			1			1
Settlement charge		(779	)		(375	)		(3,455	)

Total	$	34,216		$	58,102		$	(24,938	)

Accumulated other comprehensive loss includes the following amounts that have not yet been recognized in net periodic benefit cost:

December 31


	2012						2011

(add 000)	Gross			Net of tax			Gross			Net of tax
Prior service cost	$	2,089		$	1,263		$	2,555		$	1,545
Actuarial loss		191,675			115,868			156,994			94,903
Transition asset		(11	)		(7	)		(12	)		(7	)

Total	$	193,753		$	117,124		$	159,537		$	96,441

The prior service cost, actuarial loss and transition asset expected to be recognized in net periodic benefit cost during 2013 are $449,000 (net of a deferred tax asset of $178,000), $15,341,000 (net of a deferred tax asset of $6,067,000) and $1,000, respectively, and are included in accumulated other comprehensive loss at December 31, 2012.

The defined benefit plans’ change in projected benefit obligation is as follows:

years ended December 31


(add 000)	2012			2011
Change in projected benefit obligation:
Net projected benefit obligation at beginning of year	$	457,175		$	398,638
Service cost		13,084			11,270
Interest cost		23,653			23,178
Actuarial loss		61,286			41,971
Gross benefits paid		(19,415	)		(17,882	)

Net projected benefit obligation at end of year	$	535,783		$	457,175

The 2012 actuarial loss was primarily due to the 90-basis-point reduction in the discount rate assumption at December 31, 2012.

The Corporation’s change in plan assets, funded status and amounts recognized on the Corporation’s consolidated balance sheets are as follows:

years ended December 31


(add 000)	2012			2011
Change in plan assets:
Fair value of plan assets at beginning of year	$	325,150		$	311,688
Actual return on plan assets, net		37,308			1,129
Employer contributions		33,400			30,215
Gross benefits paid		(19,415	)		(17,882	)

Fair value of plan assets at end of year	$	376,443		$	325,150

December 31


(add 000)	2012			2011
Funded status of the plan at end of year	$	(159,340	)	$	(132,025	)

Accrued benefit cost	$	(159,340	)	$	(132,025	)

December 31


(add 000)	2012			2011
Amounts recognized on consolidated balance sheets consist of:
Current liability	$	(2,871	)	$	(2,320	)
Noncurrent liability		(156,469	)		(129,705	)

Net amount recognized at end of year	$	(159,340	)	$	(132,025	)

The accumulated benefit obligation for all defined benefit pension plans was $481,865,000 and $417,771,000 at December 31, 2012 and 2011, respectively.

Benefit obligations and fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets are as follows:

December 31


(add 000)	2012		2011
Projected benefit obligation	$	535,783	$	457,175
Accumulated benefit obligation	$	481,865	$	417,771
Fair value of plan assets	$	376,443	$	325,150

Weighted-average assumptions used to determine benefit obligations as of December 31 are:


	2012			2011
Discount rate		4.24	%		5.14	%
Rate of increase in future compensation levels		5.00	%		5.00	%

Weighted-average assumptions used to determine net periodic benefit cost for years ended December 31 are:


	2012			2011			2010
Discount rate		5.14	%		5.84	%		5.90	%
Rate of increase in future compensation levels		5.00	%		5.00	%		5.00	%
Expected long-term rate of return on assets		7.25	%		7.75	%		7.75	%

The Corporation’s expected long-term rate of return on assets is based on a building-block approach, whereby the components are weighted based on the allocation of pension plan assets.

The Corporation estimated the remaining lives of participants in the pension plans using the RP 2000 Mortality Table projected to 2015 with no phased-out improvements (“RP 2000 Mortality Table”). The RP 2000 Mortality Table includes separate tables for blue-collar employees and white-collar employees. The Corporation used the blue-collar table for its hourly workforce and the white-collar table for its salaried employees.

The target allocation for 2012 and the actual pension plan asset allocation by asset class are as follows:


	Percentage of Plan Assets
				December 31
Asset Class	2012 Target Allocation			2012			2011
Equity securities		56	%		57	%		57	%
Debt securities		34	%		33	%		34	%
Hedge funds		5	%		5	%		4	%
Real estate		5	%		5	%		5	%
Cash		--			--			--

Total		100	%		100	%		100	%

The Corporation’s investment strategy is for approximately 63% of equity securities to be invested in mid-sized to large capitalization U.S. funds with the remaining to be invested in small capitalization, emerging markets and international funds. Approximately 85% of debt securities, or fixed income investments, are invested in funds with the objective of exceeding the return of the Barclays Capital Aggregate Bond Index, with the remaining invested in high-yield funds.

The fair values of pension plan assets by asset class and fair value hierarchy level are as follows:


December 31	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Fair Value
(add 000)	2012
Equity securities:
Mid-sized to large cap	$	--	$	150,742	$	--	$	150,742
International and emerging growth funds		--		63,003		--		63,003
Debt securities:
Core fixed income		--		105,972		--		105,972
High-yield bonds		--		19,487		--		19,487
Real estate		--		17,606		--		17,606
Hedge funds		--		--		19,252		19,252
Cash		381		--		--		381
Total	$	381	$	356,810	$	19,252	$	376,443

2011
Equity securities:
Mid-sized to large cap	$	--	$	133,512	$	--	$	133,512
International and emerging growth funds		--		50,518		--		50,518
Debt securities:
Core fixed income		--		94,745		--		94,745
High-yield bonds		--		17,096		--		17,096
Real estate		--		15,841		--		15,841
Hedge funds		--		--		12,979		12,979
Cash		459		--		--		459
Total	$	459	$	311,712	$	12,979	$	325,150

The value of hedge funds is based on the values of the sub-fund investments. In determining the fair value of each sub-fund’s investment, the hedge funds’ Board of Trustees uses the values provided by the sub-funds and any other considerations that may, in its judgment, increase or decrease such estimated value.

The change in the fair value of pension plan assets valued using significant unobservable inputs (Level 3) is as follows:


year ended December 31 (add 000)	2012		2011
Balance at January 1	$	12,979	$	13,453
Purchases		5,500		--
Unrealized gain (loss)		773		(474	)
Balance at December 31	$	19,252	$	12,979

In 2012 and 2011, the Corporation made pension contributions and SERP payments of $33,400,000 and $30,215,000, respectively. The Corporation currently estimates that it will contribute $27,025,000 to its pension and SERP plans in 2013.

The expected benefit payments to be paid from plan assets for each of the next five years and the five-year period thereafter are as follows:


(add 000)
2013	$	19,589
2014	$	21,126
2015	$	23,028
2016	$	24,892
2017	$	26,631
Years 2018 - 2022	$	156,728

Postretirement Benefits. The net periodic postretirement benefit (credit) cost of postretirement plans includes the following components:


years ended December 31 (add 000)	2012			2011			2010
Components of net periodic benefit (credit) cost:
Service cost	$	227		$	350		$	548
Interest cost		1,234			2,225			2,754
Amortization of:
Prior service credit		(3,255	)		(1,740	)		(1,740	)
Actuarial (gain) loss		(283	)		(85	)		13
Total net periodic benefit (credit) cost	$	(2,077	)	$	750		$	1,575

The Corporation recognized the following amounts in consolidated comprehensive earnings:


years ended December 31 (add 000)	2012		2011			2010
Actuarial loss (gain)	$	1,993	$	(3,884	)	$	(4,133	)
Prior service credit		--		(10,397	)		(1,722	)
Amortization of:
Prior service credit		3,255		1,740			1,740
Actuarial gain (loss)		283		85			(13	)
Total	$	5,531	$	(12,456	)	$	(4,128	)

Accumulated other comprehensive loss includes the following amounts that have not yet been recognized in net periodic benefit cost:


December 31 (add 000)	2012						2011
December 31 (add 000)	Gross			Net of tax			Gross			Net of tax
Prior service credit	$	(13,598	)	$	(8,220	)	$	(16,853	)	$	(10,188	)
Actuarial gain		(934	)		(565	)		(3,210	)		(1,940	)
Total	$	(14,532	)	$	(8,785	)	$	(20,063	)	$	(12,128	)

The prior service credit expected to be recognized in net periodic benefit cost during 2013 is $3,255,000 (net of a deferred tax liability of $1,287,000), and is included in accumulated other comprehensive loss at December 31, 2012.

The postretirement health care plans’ change in benefit obligation is as follows:

years ended December 31


(add 000)	2012			2011
Change in benefit obligation:
Net benefit obligation at beginning of year	$	29,635		$	45,210
Service cost		227			350
Interest cost		1,234			2,225
Participants’ contributions		2,528			1,925
Actuarial loss (gain)		1,993			(3,884	)
Plan amendments		--			(10,397	)
Gross benefits paid		(6,522	)		(6,250	)
Federal subsidy on benefits paid		--			456
Net benefit obligation at end of year	$	29,095		$	29,635

The Corporation’s change in plan assets, funded status and amounts recognized on the Corporation’s consolidated balance sheets are as follows:

years ended December 31


(add 000)	2012			2011
Change in plan assets:
Fair value of plan assets at beginning of year	$	--		$	--
Employer contributions		3,994			3,869
Participants’ contributions		2,528			1,925
Gross benefits paid		(6,522	)		(6,250	)
Federal subsidy on benefits paid		--			456
Fair value of plan assets at end of year	$	--		$	--

December 31


(add 000)	2012			2011
Funded status of the plan at end of year	$	(29,095	)	$	(29,635	)
Accrued benefit cost	$	(29,095	)	$	(29,635	)

December 31


(add 000)	2012			2011
Amounts recognized on consolidated balance sheets consist of:
Current liability	$	(3,980	)	$	(2,930	)
Noncurrent liability		(25,115	)		(26,705	)
Net amount recognized at end of year	$	(29,095	)	$	(29,635	)

Weighted-average assumptions used to determine the postretirement benefit obligations as of December 31 are:


	2012			2011
Discount rate		3.54	%		4.44	%

Weighted-average assumptions used to determine net postretirement benefit cost for the years ended December 31 are:


	2012			2011			2010
Discount rate		4.44	%		5.57	%		5.60	%

The Corporation estimated the remaining lives of participants in the postretirement plan using the RP 2000 Mortality Table.

Assumed health care cost trend rates at December 31 are:


	2012			2011
Health care cost trend rate assumed for next year		8.0	%		7.5	%
Rate to which the cost trend rate gradually declines		5.0	%		5.0	%
Year the rate reaches the ultimate rate		2019			2017

Assumed health care cost trend rates have a significant effect on the amounts reported for the health care plans. A one percentage-point change in assumed health care cost trend rates would have the following effects:


	One Percentage Point
(add 000)	Increase		(Decrease)
Total service and interest cost components	$	59	$	(51	)
Postretirement benefit obligation	$	1,525	$	(1,299	)

The Corporation’s estimate of its contributions to its postretirement health care plans in 2013 is $3,980,000.

Effective January 2012, the Corporation no longer receives retiree drug subsidy payments for its postretirement medical plan.

The total expected benefit payments to be paid by the Corporation, net of participant contributions, for each of the next five years and the five-year period thereafter are as follows:


(add 000)	Benefit Payments
2013	$	3,980
2014	$	2,820
2015	$	2,866
2016	$	2,816
2017	$	2,718
Years 2018 - 2022	$	11,604

Defined Contribution Plans. The Corporation maintains two defined contribution plans that cover substantially all employees. These plans, qualified under Section 401(a) of the Internal Revenue Code, are retirement savings and investment plans for the Corporation’s salaried and hourly employees. Under certain provisions of these plans, the Corporation, at established rates, matches employees’ eligible contributions. The Corporation’s matching obligations were $5,956,000 in 2012, $5,370,000 in 2011 and $5,074,000 in 2010.

Postemployment Benefits. The Corporation has accrued postemployment benefits of $1,538,000 and $1,691,000 at December 31, 2012 and 2011, respectively.

- Definition

The entire disclosure for pension and other postretirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-URI http://asc.fasb.org/topic&trid=2235017

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Implementation Guide (Q and A)
-Number FAS88
-Paragraph 63
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 106
-Paragraph 518
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 03-2
-Paragraph 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 264
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph q
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph h
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 8
-Subparagraph m
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5, 6, 7, 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 158
-Paragraph 7, 21, 22
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS106-2
-Paragraph 20, 21, 22
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 30
-Paragraph 26
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Stock-Based Compensation

12 Months Ended

Dec. 31, 2012

Stock-Based Compensation

Note K: Stock-Based Compensation

The shareholders approved, on May 23, 2006, the Martin Marietta Materials, Inc. Stock-Based Award Plan, as amended from time to time (along with the Amended Omnibus Securities Award Plan, originally approved in 1994, the “Plans”). The Corporation has been authorized by the Board of Directors to repurchase shares of the Corporation’s common stock for issuance under the Plans.

Under the Plans, the Corporation grants options to employees to purchase its common stock at a price equal to the closing market value at the date of grant. The Corporation granted 71,686 employee stock options during 2012. Options granted in years subsequent to 2004 become exercisable in four annual installments beginning one year after date of grant and expire eight years from such date. Options granted prior to January 1, 2005 became exercisable in three equal annual installments beginning one year after date of grant and expire ten years from such date.

Prior to 2009, nonemployee directors received 3,000 non-qualified stock options annually. These options have an exercise price equal to the market value at the date of grant, vested immediately and expire ten years from the grant date.

The following table includes summary information for stock options as of December 31, 2012:


	Number of Options			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life (years)
Outstanding at January 1, 2012		1,151,567		$	89.93
Granted		71,686		$	69.12
Exercised		(188,631	)	$	48.06
Terminated		(6,665	)	$	100.73
Outstanding at December 31, 2012		1,027,957		$	96.10		3.4
Exercisable at December 31, 2012		854,178		$	99.52		2.8

The weighted-average grant-date exercise price of options granted during 2012, 2011 and 2010 was $69.12, $86.90 and $95.27, respectively. The aggregate intrinsic values of options exercised during the years ended December 31, 2012, 2011 and 2010 were $7,176,000, $1,621,000 and $3,978,000, respectively, and were based on the closing prices of the Corporation’s common stock on the dates of exercise. The aggregate intrinsic values for options outstanding and exercisable at December 31, 2012 were $13,121,000 and $10,492,000, respectively, and were based on the closing price of the Corporation’s common stock at December 31, 2012, which was $94.28.

Additionally, an incentive stock plan has been adopted under the Plans whereby certain participants may elect to use up to 50% of their annual incentive compensation to acquire units representing shares of the Corporation’s common stock at a 20% discount to the market value on the date of the incentive compensation award. Certain executive officers are required to participate in the incentive stock plan at certain minimum levels. Participants earn the right to receive unrestricted shares of common stock in an amount equal to their respective units generally at the end of a 34-month period of additional employment from the date of award or at retirement beginning at age 62. All rights of ownership of the common stock convey to the participants upon the issuance of their respective shares at the end of the ownership-vesting period, with the exception of dividend equivalents that are paid on the units during the vesting period.

The Corporation grants restricted stock awards under the Plans to a group of executive officers, key personnel and nonemployee directors. Certain restricted stock awards are based on specific common stock performance criteria over a specified period of time. In addition, certain awards are granted to individuals to encourage retention and motivate key employees. These awards generally vest if the employee is continuously employed over a specified period of time and require no payment from the employee. Awards granted to nonemployee directors vest immediately.

The following table summarizes information for incentive stock awards and restricted stock awards as of December 31, 2012:


	Incentive Stock					Restricted Stock
	Number of Awards			Weighted- Average Grant-Date Fair Value		Number of Awards			Weighted- Average Grant-Date Fair Value
January 1, 2012		31,700		$	81.04		305,088		$	95.72
Awarded		12,702		$	81.41		58,918		$	69.12
Distributed		(15,520	)	$	80.55		(119,328	)	$	111.92
Forfeited		(1,155	)	$	82.49		(6,084	)	$	90.06
December 31, 2012		27,727		$	81.42		238,594		$	81.19

The weighted-average grant-date fair value of incentive compensation awards granted during 2012, 2011 and 2010 was $81.41, $84.71 and $79.78, respectively. The weighted-average grant-date fair value of restricted stock awards granted during 2012, 2011 and 2010 was $69.12, $86.90 and $91.33, respectively.

The aggregate intrinsic values for incentive compensation awards and restricted stock awards at December 31, 2012 were $808,000 and $22,495,000, respectively, and were based on the closing price of the Corporation’s common stock at December 31, 2012, which was $94.28. The aggregate intrinsic values of incentive compensation awards distributed during the years ended December 31, 2012, 2011 and 2010 were $375,000, $165,000 and $0, respectively. The aggregate intrinsic values of restricted stock awards distributed during the years ended December 31, 2012, 2011 and 2010 were $8,695,000, $10,237,000 and $10,031,000, respectively. The aggregate intrinsic values for distributed awards were based on the closing prices of the Corporation’s common stock on the dates of distribution.

At December 31, 2012, there are approximately 510,000 awards available for grant under the Plans.

In 1996, the Corporation adopted the Shareholder Value Achievement Plan to award shares of the Corporation’s common stock to key senior employees based on certain common stock performance criteria over a long-term period. Under the terms of this plan, 250,000 shares of common stock were reserved for issuance. Through December 31, 2012, 42,025 shares have been issued under this plan. No awards have been granted under this plan after 2000.

Also, the Corporation adopted and the shareholders approved the Common Stock Purchase Plan for Directors in 1996, which provides nonemployee directors the election to receive all or a portion of their total fees in the form of the Corporation’s common stock. Under the terms of this plan, 300,000 shares of common stock were reserved for issuance. Currently, directors are required to defer at least 50% of their retainer in the form of the Corporation’s common stock at a 20% discount to market value. Directors elected to defer portions of their fees representing 23,830, 19,977 and 17,804 shares of the Corporation’s common stock under this plan during 2012, 2011 and 2010, respectively.

The following table summarizes stock-based compensation expense for the years ended December 31, 2012, 2011 and 2010, unrecognized compensation cost for nonvested awards at December 31, 2012 and the weighted-average period over which unrecognized compensation cost is expected to be recognized:


(add 000, except year data)	Stock Options		Restricted Stock Awards		Incentive Compensation Awards		Directors’ Awards		Total
Stock-based compensation expense recognized for years ended December 31:
2012	$	1,835	$	4,980	$	237	$	729	$	7,781
2011	$	2,602	$	7,929	$	272	$	719	$	11,522
2010	$	3,406	$	10,368	$	261	$	640	$	14,675
Unrecognized compensation cost at December 31, 2012:	$	1,473	$	4,400	$	51	$	—	$	5,924
Weighted-average period over which unrecognized compensation cost to be recognized:		1.9 years		2.1 years		1.5 years		—

For the years ended December 31, 2012, 2011 and 2010, the Corporation recognized a tax benefit related to stock-based compensation expense of $3,075,000, $4,557,000 and $5,804,000, respectively.

The following presents expected stock-based compensation expense in future periods for outstanding awards as of December 31, 2012:


(add 000)
2013	$	3,199
2014		1,975
2015		720
2016		30
Total	$	5,924

Stock-based compensation expense is included in selling, general and administrative expenses in the Corporation’s consolidated statements of earnings.

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 50
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 40
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph 64, 65, A240
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Statement of Position (SOP)
-Number 93-6
-Paragraph 53
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Leases

12 Months Ended

Dec. 31, 2012

Leases

Note L: Leases

Total lease expense for operating leases was $44,177,000, $46,314,000 and $47,830,000 for the years ended December 31, 2012, 2011 and 2010, respectively. The Corporation’s operating leases generally contain renewal and/or purchase options with varying terms. The Corporation has royalty agreements that generally require royalty payments based on tons produced or total sales dollars and also contain minimum payments. Total royalties, principally for leased properties, were $43,445,000, $36,333,000 and $37,474,000 for the years ended December 31, 2012, 2011 and 2010, respectively.

Future minimum lease and mineral and other royalty commitments for all noncancelable agreements as of December 31, 2012 are as follows:


(add 000)
2013	$	75,298
2014		55,706
2015		51,353
2016		38,828
2017		29,851
Thereafter		109,464
Total	$	360,500

Of the total future minimum commitments, $107,011,000 relates to the Corporation’s contracts of affreightment.

- Definition

Tabular disclosure of a lessee's leasing arrangements including: (1) the basis on which contingent rental payments are determined, (2) the existence and terms of renewal or purchase options and escalation clauses, (3) restrictions imposed by lease arrangements, such as those concerning dividends, additional debt, and further leasing, (4) rent holidays, rent concessions, or leasehold improvement incentives and unusual provisions or conditions. Disclosure may also include the specific period used to amortize material leasehold improvements made at the inception of the lease or during the lease term. Additionally, for operating leases having initial or remaining noncancelable lease terms in excess of one year: (a) future minimum rental payments required as of the date of the latest balance sheet presented, in the aggregate and for each of the five succeeding fiscal years, (b) the total of minimum rentals to be received in the future under noncancelable subleases as of the date of the latest balance sheet presented, and (c) for all operating leases, rental expense for each period for which an income statement is presented, with separate amounts for minimum rentals, contingent rentals, and sublease rentals. Rental payments under leases with terms of a month or less that were not renewed need not be included.

+ References + Details

Shareholders' Equity

12 Months Ended

Dec. 31, 2012

Shareholders' Equity

Note M: Shareholders’ Equity

The authorized capital structure of the Corporation includes 100,000,000 shares of common stock, with a par value of $0.01 a share. At December 31, 2012, approximately 2,132,000 common shares were reserved for issuance under stock-based plans.

Pursuant to authority granted by its Board of Directors, the Corporation can repurchase common stock through open purchases. The Corporation did not repurchase any shares of common stock during the years ended December 31, 2012, 2011 or 2010. At December 31, 2012, 5,041,900 shares of common stock were remaining under the Corporation’s repurchase authorization.

In addition to common stock, the Corporation’s capital structure includes 10,000,000 shares of preferred stock with a par value of $0.01 a share. 100,000 shares of Class A Preferred Stock were reserved for issuance under the Corporation’s 1996 Rights Agreement that expired by its own terms on October 21, 2006. Upon its expiration, the Board of Directors adopted a new Rights Agreement (the “Rights Agreement”) and reserved 200,000 shares of Junior Participating Class B Preferred Stock for issuance. In accordance with the Rights Agreement, the Corporation issued a dividend of one right for each share of the Corporation’s common stock outstanding as of October 21, 2006, and one right continues to attach to each share of common stock issued thereafter. The rights will become exercisable if any person or group acquires beneficial ownership of 15 percent or more of the Corporation’s common stock. Once exercisable and upon a person or group acquiring 15 percent or more of the Corporation’s common stock, each right (other than rights owned by such person or group) entitles its holder to purchase, for an exercise price of $315 per share, a number of shares of the Corporation’s common stock (or in certain circumstances, cash, property or other securities of the Corporation) having a market value of twice the exercise price, and under certain conditions, common stock of an acquiring company having a market value of twice the exercise price. If any person or group acquires beneficial ownership of 15 percent or more of the Corporation’s common stock, the Corporation may, at its option, exchange the outstanding rights (other than rights owned by such acquiring person or group) for shares of the Corporation’s common stock or Corporation equity securities deemed to have the same value as one share of common stock or a combination thereof, at an exchange ratio of one share of common stock per right. The rights are subject to adjustment if certain events occur, and they will initially expire on October 21, 2016, if not terminated sooner. The Corporation’s Rights Agreement provides that the Corporation’s Board of Directors may, at its option, redeem all of the outstanding rights at a redemption price of $0.001 per right.

- Definition

The entire disclosure for shareholders' equity, comprised of portions attributable to the parent entity and noncontrolling interest, if any, including other comprehensive income (as applicable). Including, but not limited to: (1) balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings; (2) accumulated balance for each classification of other comprehensive income and total amount of comprehensive income; (3) amount and nature of changes in separate accounts, including the number of shares authorized and outstanding, number of shares issued upon exercise and conversion, and for other comprehensive income, the adjustments for reclassifications to net income; (4) rights and privileges of each class of stock authorized; (5) basis of treasury stock, if other than cost, and amounts paid and accounting treatment for treasury stock purchased significantly in excess of market; (6) dividends paid or payable per share and in the aggregate for each class of stock for each period presented; (7) dividend restrictions and accumulated preferred dividends in arrears (in aggregate and per share amount); (8) retained earnings appropriations or restrictions, such as dividend restrictions; (9) impact of change in accounting principle, initial adoption of new accounting principle and correction of an error in previously issued financial statements; (10) shares held in trust for Employee Stock Ownership Plan (ESOP); (11) deferred compensation related to issuance of capital stock; (12) note received for issuance of stock; (13) unamortized discount on shares; (14) description, terms, and number of warrants or rights outstanding; (15) shares under subscription and subscription receivables, effective date of new retained earnings after quasi-reorganization and deficit eliminated by quasi-reorganization and, for a period of at least ten years after the effective date, the point in time from which the new retained dates; and (16) retroactive effective of subsequent change in capital structure.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(d),(e))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21484-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section S99
-Paragraph 2
-Subparagraph (SAB TOPIC 4.E)
-URI http://asc.fasb.org/extlink&oid=6228006&loc=d3e74512-122707

Reference 4: http://www.xbrl.org/2003/role/presentationRef
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-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21488-112644

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29-31)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 4
-Subparagraph (SAB TOPIC 4.C)
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Preferred Stock
-URI http://asc.fasb.org/extlink&oid=6521494

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21564-112644

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 43
-Section B
-Paragraph 7, 11A
-Chapter 1
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 16: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 17: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph d
-Article 4

Reference 18: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
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Reference 19: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 4
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Reference 20: http://www.xbrl.org/2003/role/presentationRef
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-Name Regulation S-X (SX)
-Number 210
-Section 08
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Reference 21: http://www.xbrl.org/2003/role/presentationRef
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-Name Staff Accounting Bulletin (SAB)
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Reference 22: http://www.xbrl.org/2003/role/presentationRef
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-Name Statement of Financial Accounting Standard (FAS)
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 23: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

+ Details

Commitments and Contingencies

12 Months Ended

Dec. 31, 2012

Commitments and Contingencies

Note N: Commitments and Contingencies

Legal and Administrative Proceedings. The Corporation is engaged in certain legal and administrative proceedings incidental to its normal business activities. In the opinion of management and counsel, based upon currently-available facts, it is remote that the ultimate outcome of any litigation and other proceedings, including those pertaining to environmental matters (see Note A), relating to the Corporation and its subsidiaries, will have a material adverse effect on the overall results of the Corporation’s operations, its cash flows or its financial position.

Asset Retirement Obligations. The Corporation incurs reclamation costs as part of its aggregates mining process. The estimated future reclamation obligations have been discounted to their present value and are being accreted to their projected future obligations via charges to operating expenses. Additionally, the fixed assets recorded concurrently with the liabilities are being depreciated over the period until reclamation activities are expected to occur. Total accretion and depreciation expenses for 2012, 2011 and 2010 were $3,743,000, $3,892,000 and $3,689,000, respectively, and are included in other operating income and expenses, net, in the consolidated statements of earnings.

Projected estimated reclamation obligations should include a market risk premium which represents the amount an external party would charge for bearing the uncertainty of guaranteeing a fixed price today for performance in the future. However, due to the average remaining quarry life exceeding 60 years at normalized production rates and the nature of quarry reclamation work, the Corporation believes that it is impractical for external parties to agree to a fixed price today. Therefore, a market risk premium has not been included in the estimated reclamation obligation.

The following shows the changes in the asset retirement obligations:

years ended December 31:


(add 000)	2012			2011
Balance at January 1	$	43,233		$	41,079
Accretion expense		2,712			2,645
Liabilities incurred		204			3,062
Liabilities settled		(126	)		(2,091	)
Revisions in estimated cash flows		150			(1,462	)
Balance at December 31	$	46,173		$	43,233

Other Environmental Matters. The Corporation’s operations are subject to and affected by federal, state and local laws and regulations relating to the environment, health and safety and other regulatory matters. Certain of the Corporation’s operations may, from time to time, involve the use of substances that are classified as toxic or hazardous within the meaning of these laws and regulations. Environmental operating permits are, or may be, required for certain of the Corporation’s operations, and such permits are subject to modification, renewal and revocation. The Corporation regularly monitors and reviews its operations, procedures and policies for compliance with these laws and regulations. Despite these compliance efforts, risk of environmental remediation liability is inherent in the operation of the Corporation’s businesses, as it is with other companies engaged in similar businesses. The Corporation has no material provisions for environmental remediation liabilities and does not believe such liabilities will have a material adverse effect on the Corporation in the future.

The United States Environmental Protection Agency (“USEPA”) includes the lime industry as a national enforcement priority under the federal Clean Air Act (“CAA”). As part of the industry wide effort, the USEPA issued Notices of Violation/Findings of Violation (“NOVs”) to the Corporation in 2010 and 2011 regarding the Corporation’s compliance with the CAA New Source Review (“NSR”) program at its Specialty Products dolomitic lime manufacturing plant in Woodville, Ohio. The Corporation has been providing information to the USEPA in response to these NOVs and has had several meetings with the USEPA. The Corporation believes it is in substantial compliance with the NSR program. Because the enforcement proceeding is in its initial stage, at this time the Corporation cannot reasonably estimate what likely penalties or upgrades to equipment might ultimately be required. The Corporation believes that any costs related to any required upgrades will be spread over time and will not have a material adverse effect on the Corporation’s operations or its financial condition, but can give no assurance that the ultimate resolution of this matter will not have a material adverse effect on the financial condition or results of operations of the Specialty Products segment.

Insurance Reserves. The Corporation has insurance coverage for workers’ compensation, automobile liability, marine liability and general liability claims. The Corporation is also self-insured for health claims. At December 31, 2012 and 2011, reserves of $20,294,000 and $23,749,000, respectively, were recorded for all such insurance claims. During 2012, the Corporation’s casualty claims liability decreased by $3,600,000 based on changes in the estimated ultimate cost of claims for prior policy years. This change in estimate increased 2012 net earnings by $2,176,000, or $0.05 per diluted share. During 2011, the Corporation’s casualty claims liability increased by $1,100,000. This change in estimate decreased 2011 net earnings by $665,000, or $0.01 per diluted share. During 2010, the Corporation increased its accrual for casualty claims by $1,500,000, which decreased 2010 net earnings by $907,000, or $0.02 per diluted share.

Letters of Credit. In the normal course of business, the Corporation provides certain third parties with standby letter of credit agreements guaranteeing its payment for certain insurance claims, utilities and property improvements. At December 31, 2012, the Corporation was contingently liable for $15,288,000 in letters of credit, of which $2,507,000 were issued under the Corporation’s Revolving Facility. Certain of these underlying obligations are accrued on the Corporation’s balance sheet.

Surety Bonds. In the normal course of business, at December 31, 2012, the Corporation was contingently liable for $261,730,000 in surety bonds required by certain states and municipalities and their related agencies. The bonds are principally for certain insurance claims, construction contracts, reclamation obligations and mining permits guaranteeing the Corporation’s own performance. Certain of these underlying obligations, including those for asset retirement requirements and insurance claims, are accrued on the Corporation’s balance sheet. Five of these bonds total $72,673,000, or 28% of all outstanding surety bonds. The Corporation has indemnified the underwriting insurance companies, Safeco Corporation, a subsidiary of Liberty Mutual Group, and Zurich Insurance Company, against any exposure under the surety bonds. In the Corporation’s past experience, no material claims have been made against these financial instruments.

Guarantee of Affiliate. The Corporation has an unconditional guaranty of payment agreement with Fifth Third to guarantee the repayment of amounts borrowed by an affiliate under a $24,000,000 revolving line of credit provided by Fifth Third that expires in July 2013 and a guaranty agreement with Bank of America, N.A. to guarantee a $6,200,000 amortizing loan due April 2015. The affiliate has agreed to reimburse and indemnify the Corporation for any payments and expenses the Corporation may incur from these agreements. The Corporation holds a subordinate lien of the affiliate’s assets as collateral for potential payments under the agreements.

Purchase Commitments. The Corporation had purchase commitments for property, plant and equipment of $15,839,000 as of December 31, 2012. The Corporation also had other purchase obligations related to energy and service contracts of $34,545,000 as of December 31, 2012. The Corporation’s contractual purchase commitments as of December 31, 2012 are as follows:


(add 000)
2013	$	41,496
2014		8,659
2015		229
Total	$	50,384

Employees. Approximately 14% of the Corporation’s employees are represented by a labor union. All such employees are hourly employees.

- Definition

The entire disclosure for commitments and contingencies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6449706&loc=d3e16207-108621

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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-Subparagraph (SX 210.5-02.25)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25287-109308

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 14
-Paragraph 3
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 9, 10, 11, 12
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Business Segments

12 Months Ended

Dec. 31, 2012

Business Segments

Note O: Business Segments

The Corporation currently conducts its aggregates and vertically-integrated operations through three reportable business segments: Mideast Group, Southeast Group and West Group. The Corporation also has a Specialty Products segment that produces magnesia-based chemicals products and dolomitic lime. These segments are consistent with the Corporation’s management reporting structure as of December 31, 2012. The accounting policies used for segment reporting are the same as those described in Note A.

The Corporation’s evaluation of performance and allocation of resources are based primarily on earnings from operations. Earnings from operations are net sales less cost of sales, selling, general and administrative expenses, and business development costs; include other operating income and expenses; and exclude interest expense, other nonoperating income and expenses, net, and income taxes. Corporate earnings from operations primarily include depreciation on capitalized interest, expenses for corporate administrative functions, unallocated corporate expenses and other nonrecurring and/or non-operational adjustments excluded from the Corporation’s evaluation of business segment performance and resource allocation. All debt and related interest expense is held at Corporate.

Assets employed by segment include assets directly identified with those operations. Corporate assets consist primarily of cash and cash equivalents, property, plant and equipment for corporate operations and other assets not directly identifiable with a reportable business segment.

The following tables display selected financial data for the Corporation’s reportable business segments.

Selected Financial Data by Business Segment

years ended December 31

(add 000)


Total revenues	2012			2011			2010
Mideast Group	$	445,097		$	430,638		$	420,618
Southeast Group		304,524			306,436			336,351
West Group		1,067,333			757,548			702,657
Total Aggregates Business		1,816,954			1,494,622			1,459,626
Specialty Products		220,713			219,123			193,180
Total	$	2,037,667		$	1,713,745		$	1,652,806

Net sales
Mideast Group	$	406,651		$	395,470		$	390,581
Southeast Group		282,161			283,287			303,174
West Group		947,694			640,551			605,537
Total Aggregates Business		1,636,506			1,319,308			1,299,292
Specialty Products		202,217			200,575			176,346
Total	$	1,838,723		$	1,519,883		$	1,475,638

Gross profit (loss)
Mideast Group	$	108,876		$	104,204		$	109,865
Southeast Group		10,755			21,009			46,062
West Group		134,503			104,749			108,333
Total Aggregates Business		254,134			229,962			264,260
Specialty Products		77,223			75,405			61,685
Corporate		(5,441	)		(3,395	)		(4,294	)
Total	$	325,916		$	301,972		$	321,651

Selling, general and administrative expenses
Mideast Group	$	36,928		$	37,762		$	36,914
Southeast Group		22,832			26,873			27,709
West Group		56,664			43,879			42,861
Total Aggregates Business		116,424			108,514			107,484
Specialty Products		9,295			9,197			11,046
Corporate		12,679			6,427			11,892
Total	$	138,398		$	124,138		$	130,422

Earnings (Loss) from operations
Mideast Group	$	75,028		$	69,723		$	75,261
Southeast Group		(13,470	)		(5,884	)		17,924
West Group		81,975			63,592			75,330
Total Aggregates Business		143,533			127,431			168,515
Specialty Products		68,542			66,305			50,578
Corporate		(57,122	)		(32,757	)		(20,786	)
Total	$	154,953		$	160,979		$	198,307

Assets employed
Mideast Group	$	724,945		$	753,005		$	758,735
Southeast Group		652,567			663,321			836,695
West Group		1,413,838			1,389,746			1,102,798
Total Aggregates Business		2,791,350			2,806,072			2,698,228
Specialty Products		157,673			120,305			102,103
Corporate		211,903			221,445			274,412
Total	$	3,160,926		$	3,147,822		$	3,074,743

Depreciation, depletion and amortization
Mideast Group	$	44,189		$	46,668		$	50,524
Southeast Group		39,007			51,090			56,622
West Group		78,271			59,419			56,705
Total Aggregates Business		161,467			157,177			163,851
Specialty Products		7,838			7,075			8,385
Corporate		7,906			9,155			9,301
Total	$	177,211		$	173,407		$	181,537



years ended December 31 (add 000) Total property additions	2012		2011		2010
Mideast Group	$	32,179	$	39,504	$	50,869
Southeast Group		29,541		29,531		54,138
West Group		47,233		243,195		58,819
Total Aggregates Business		108,953		312,230		163,826
Specialty Products		38,873		21,983		6,431
Corporate		3,887		6,340		1,823
Total	$	151,713	$	340,553	$	172,080

Property additions through acquisitions
Mideast Group	$	--	$	--	$	12,912
Southeast Group		--		--		20,902
West Group		--		40,229		--
Total Aggregates Business		--		40,229		33,814
Specialty Products		--		--		--
Corporate		--		--		--
Total	$	--	$	40,229	$	33,814

In 2012, the West Group acquired $690,000 of capital assets through noncash transactions. Property additions for the West Group in 2011 included $144,961,000 of capital assets acquired through an asset exchange with Lafarge North America Inc. Property additions for the Mideast Group in 2010 included $1,900,000 of land acquired through noncash transactions. Property additions for the Southeast Group in 2010 included $450,000 of land acquired through noncash transactions.

The Aggregates business includes the aggregates product line and the vertically-integrated operations, which includes asphalt, ready mixed concrete and road paving product lines. All vertically-integrated operations reside in the West Group. Product lines for the Specialty Products segment consist of magnesia-based chemicals, dolomitic lime and other. Total revenues, net sales and gross profit by product line are as follows:

years ended December 31

(add 000)


Total revenues	2012		2011		2010
Aggregates	$	1,470,953	$	1,372,243	$	1,365,729
Asphalt		93,288		63,942		51,055
Ready Mixed Concrete		116,328		33,075		25,067
Road Paving		136,385		25,362		17,775
Total Aggregates Business		1,816,954		1,494,622		1,459,626
Magnesia-Based Chemicals		158,752		158,255		132,891
Dolomitic Lime		60,280		59,496		58,630
Other		1,681		1,372		1,659
Total Specialty Products		220,713		219,123		193,180
Total	$	2,037,667	$	1,713,745	$	1,652,806

Net sales
Aggregates	$	1,303,975	$	1,213,635	$	1,218,569
Asphalt		79,816		47,315		37,917
Ready Mixed Concrete		116,320		32,990		25,031
Road Paving		136,395		25,368		17,775
Total Aggregates Business		1,636,506		1,319,308		1,299,292
Magnesia-Based Chemicals		142,922		142,620		120,475
Dolomitic Lime		57,614		56,582		54,212
Other		1,681		1,373		1,659
Total Specialty Products		202,217		200,575		176,346
Total	$	1,838,723	$	1,519,883	$	1,475,638

years ended December 31

(add 000)


Gross profit (loss)	2012			2011			2010
Aggregates	$	240,614		$	223,275		$	254,290
Asphalt		12,099			5,836			8,988
Ready Mixed Concrete		(1,159	)		(250	)		(508	)
Road Paving		2,580			1,101			1,490
Total Aggregates Business		254,134			229,962			264,260
Magnesia-Based Chemicals		54,508			50,726			39,821
Dolomitic Lime		22,316			24,548			24,041
Other		399			131			(2,177	)
Total Specialty Products		77,223			75,405			61,685
Corporate		(5,441	)		(3,395	)		(4,294	)
Total	$	325,916		$	301,972		$	321,651

Domestic and foreign total revenues are as follows:

years ended December 31


(add 000)	2012		2011		2010
Domestic	$	1,996,142	$	1,671,999	$	1,618,715
Foreign		41,525		41,746		34,091
Total	$	2,037,667	$	1,713,745	$	1,652,806

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8981-108599

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8971-108599

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8595-108599

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8380-108599

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8933-108599

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 26
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8844-108599

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 35
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8984-108599

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9031-108599

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9054-108599

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8538-108599

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 29
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8864-108599

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8924-108599

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8906-108599

Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 131
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Supplemental Cash Flow Information

12 Months Ended

Dec. 31, 2012

Supplemental Cash Flow Information

Note P: Supplemental Cash Flow Information

The components of the change in other assets and liabilities, net, are as follows:

years ended December 31


(add 000)	2012			2011			2010
Other current and noncurrent assets	$	(2,354	)	$	2,439		$	3,245
Accrued salaries, benefits and payroll taxes		7			(4,722	)		(1,415	)
Accrued insurance and other taxes		2,274			2,873			(739	)
Accrued income taxes		(13,343	)		6,139			10,890
Accrued pension, postretirement and postemployment benefits		(13,904	)		(16,378	)		(22,257	)
Other current and noncurrent liabilities		3,836			(3,092	)		(3,491	)
Change in other assets and liabilities	$	(23,484	)	$	(12,741	)	$	(13,767	)

The change in other current and noncurrent assets for the year ended December 31, 2012 relates to an increase in costs in excess of billings for the Corporation’s road paving business. The road paving business typically has a longer cash collection cycle compared with the Aggregates business’ other product lines. The change in accrued income taxes was attributable to an increase in prepaid income taxes of $12,500,000 in 2012. The change in other current and noncurrent liabilities is primarily driven by the unrecognized tax benefits increase in 2012 related to the estimated settlement of the APA.

Noncash investing and financing activities are as follows:

years ended December 31


(add 000)	2012		2011		2010
Noncash investing and financing activities:
Acquisition of assets through asset exchange	$	690	$	150,000	$	--
Acquisition of land through property exchange	$	--	$	--	$	1,900
Issuance of notes payable for acquisition of land	$	--	$	--	$	450

Other Expenses

12 Months Ended

Dec. 31, 2012

Other Expenses

Note Q: Other Expenses

In 2012, the Corporation incurred business development costs of $35,140,000, which decreased 2012 net earnings by $21,242,000, or $0.46 per diluted share. In 2011, the Corporation incurred business development costs of $18,575,000, which decreased net earnings for 2011 by $11,409,000, or $0.25 per diluted share.

The Corporation incurred early retirement and severance expenses totaling $3,885,000, or $0.05 per diluted share, in 2012 and $4,414,000, or $0.06 per diluted share, in 2011. These nonrecurring charges are included in selling, general and administrative expenses in the consolidated statements of earnings.

In 2010, the Corporation settled legal proceedings relating to its Greenwood, Missouri, operation for approximately $7,000,000 in cash. In connection with the settlement, the Corporation reversed the excess of the previously-established legal reserve, thereby increasing net earnings for 2010 by $2,751,000, or $0.06 per diluted share.

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS

12 Months Ended

Dec. 31, 2012

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS

SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES


Col A	Col B		Col C					Col D			Col E
			Additions
Description	Balance at beginning of period		(1) Charged to costs and expenses		(2) Charged to other accounts— describe			Deductions— describe			Balance at end of period
			(Amounts in Thousands)

Year ended December 31, 2012

Allowance for doubtful accounts	$	5,295	$	774	$	-		$	-		$	6,069

Allowance for uncollectible notes receivable		295		145		-			-			440

Inventory valuation allowance		92,481		4,475		-			139	^(a)		96,817

Accumulated amortization of intangible assets		12,824		3,593		-			425	^(b)		15,992
Year ended December 31, 2011

Allowance for doubtful accounts	$	3,578	$	1,717	$	-		$	-		$	5,295

Allowance for uncollectible notes receivable		179		116		-			-			295

Inventory valuation allowance		87,044		7,882		2,154	^(c)		4,599	^(a)		92,481

Accumulated amortization of intangible assets		14,322		1,812		-			984 2,326	^(b) ^(a)		12,824

Year ended December 31, 2010

Allowance for doubtful accounts	$	4,622	$	-	$	-		$	1,044	^(d)	$	3,578

Allowance for uncollectible notes receivable		151		28		-			-			179
Inventory valuation allowance		82,674		4,370		-						87,044
Accumulated amortization of intangible assets		13,155		1,453		-			286	^(b⁾		14,322

(a)	Divestitures.

(b)	Write off of fully amortized intangible assets.

(c)	Acquisitions.

(d)	To adjust allowance for change in estimates.

Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2012

Organization

Use of Estimates

Basis of Consolidation

Revenue Recognition

Freight and Delivery Costs

Cash and Cash Equivalents

Customer Receivables

Inventories Valuation

Properties and Depreciation

Properties and Depreciation. Property, plant and equipment are stated at cost. The estimated service lives for property, plant and equipment are as follows:


Class of Assets	Range of Service Lives

Buildings		4 to 50 years

Machinery & Equipment		2 to 35 years

Land Improvements		4 to 30 years

Mineral reserves and mineral interests, when acquired in connection with a business combination, are valued using an income approach over the life of the proven and probable reserves.

Repair and Maintenance Costs

Repair and Maintenance Costs. Repair and maintenance costs that do not substantially extend the life of the Corporation’s plant and equipment are expensed as incurred.

Goodwill and Intangible Assets

Retirement Plans and Postretirement Benefits

Stock-Based Compensation


	2012	2011	2010
Risk-free interest rate	1.38%	2.82%	2.97%
Dividend yield	2.10%	1.90%	1.80%
Volatility factor	37.50%	36.70%	37.30%
Expected term	7.3 years	7.2 years	7.2 years

Based on these assumptions, the weighted-average fair value of each stock option granted was $22.18, $29.94 and $33.95 for 2012, 2011 and 2010, respectively.

Environmental Matters

Income Taxes

Uncertain Tax Positions

Sales Taxes

Sales Taxes. Sales taxes collected from customers are recorded as liabilities until remitted to taxing authorities and therefore are not reflected in the consolidated statements of earnings.

Research and Development Costs

Research and Development Costs. Research and development costs are charged to operations as incurred.

Start-Up Costs

Start-Up Costs. Noncapital start-up costs for new facilities and products are charged to operations as incurred.

Warranties

Consolidated Comprehensive Earnings and Accumulated Other Comprehensive Loss

The components of accumulated other comprehensive loss are as follows:


December 31 (add 000)	2012			2011			2010
Unrecognized actuarial losses, prior service costs and transition assets related to pension and postretirement benefits	$	(108,189	)	$	(84,204	)	$	(54,245	)
Foreign currency translation gains		6,157			5,076			5,929
Unamortized value of terminated forward starting interest rate swap agreements		(4,137	)		(4,762	)		(5,344	)

Accumulated other comprehensive loss	$	(106,169	)	$	(83,890	)	$	(53,660	)

The components of accumulated other comprehensive loss are net of cumulative noncurrent deferred tax assets as follows:


December 31 (add 000)	2012		2011		2010
Unrecognized actuarial losses, prior service costs and transition assets related to pension and postretirement benefits	$	70,881	$	55,161	$	39,501
Unamortized value of terminated forward starting interest rate swap agreements		2,707		3,116		3,497

Cumulative noncurrent deferred tax assets	$	73,588	$	58,277	$	42,998

Earnings Per Common Share

The following table reconciles the numerator and denominator for basic and diluted earnings per common share:


years ended December 31 (add 000)	2012			2011			2010
Net earnings from continuing operations attributable to Martin Marietta Materials, Inc.	$	84,910		$	78,378		$	97,104
Less: Distributed and undistributed earnings attributable to unvested awards		(500	)		(657	)		(993	)

Basic and diluted net earnings attributable to common shareholders from continuing operations attributable to Martin Marietta Materials, Inc.		84,410			77,721			96,111
Basic and diluted net (loss) earnings attributable to common shareholders from discontinued operations		(436	)		4,001			(92	)

Basic and diluted net earnings attributable to common shareholders attributable to Martin Marietta Materials, Inc.	$	83,974		$	81,722		$	96,019


Basic weighted-average common shares outstanding		45,828			45,652			45,485
Effect of dilutive employee and director awards		142			141			174

Diluted weighted-average common shares outstanding		45,970			45,793			45,659

Accounting Changes

Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Estimated Service Lives for Property Plant and Equipment

The estimated service lives for property, plant and equipment are as follows:


Class of Assets	Range of Service Lives

Buildings		4 to 50 years

Machinery & Equipment		2 to 35 years

Land Improvements		4 to 30 years

Summary of Key Assumptions Used in Determining Fair Value of Stock Options

Key assumptions used in determining the fair value of the stock options awarded in 2012, 2011 and 2010 were:


	2012	2011	2010
Risk-free interest rate	1.38%	2.82%	2.97%
Dividend yield	2.10%	1.90%	1.80%
Volatility factor	37.50%	36.70%	37.30%
Expected term	7.3 years	7.2 years	7.2 years

Components of Accumulated Other Comprehensive Loss

The components of accumulated other comprehensive loss are as follows:


December 31 (add 000)	2012			2011			2010
Unrecognized actuarial losses, prior service costs and transition assets related to pension and postretirement benefits	$	(108,189	)	$	(84,204	)	$	(54,245	)
Foreign currency translation gains		6,157			5,076			5,929
Unamortized value of terminated forward starting interest rate swap agreements		(4,137	)		(4,762	)		(5,344	)

Accumulated other comprehensive loss	$	(106,169	)	$	(83,890	)	$	(53,660	)

Components of Accumulated Other Comprehensive Loss Net of Cumulative Noncurrent Deferred Tax Assets

The components of accumulated other comprehensive loss are net of cumulative noncurrent deferred tax assets as follows:


December 31 (add 000)	2012		2011		2010
Unrecognized actuarial losses, prior service costs and transition assets related to pension and postretirement benefits	$	70,881	$	55,161	$	39,501
Unamortized value of terminated forward starting interest rate swap agreements		2,707		3,116		3,497

Cumulative noncurrent deferred tax assets	$	73,588	$	58,277	$	42,998

Basic and Diluted Earnings Per Common Share

The following table reconciles the numerator and denominator for basic and diluted earnings per common share:


years ended December 31 (add 000)	2012			2011			2010
Net earnings from continuing operations attributable to Martin Marietta Materials, Inc.	$	84,910		$	78,378		$	97,104
Less: Distributed and undistributed earnings attributable to unvested awards		(500	)		(657	)		(993	)

Basic and diluted net earnings attributable to common shareholders from continuing operations attributable to Martin Marietta Materials, Inc.		84,410			77,721			96,111
Basic and diluted net (loss) earnings attributable to common shareholders from discontinued operations		(436	)		4,001			(92	)

Basic and diluted net earnings attributable to common shareholders attributable to Martin Marietta Materials, Inc.	$	83,974		$	81,722		$	96,019


Basic weighted-average common shares outstanding		45,828			45,652			45,485
Effect of dilutive employee and director awards		142			141			174

Diluted weighted-average common shares outstanding		45,970			45,793			45,659

Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2012

Changes in Goodwill

The following table shows the changes in goodwill, all of which relate to the Aggregates business, by reportable segment and in total:



years ended December 31	Mideast Group			Southeast Group			West Group			Total

(add 000)	2012

Balance at beginning of period	$	122,052		$	72,073		$	422,546		$	616,671
Adjustments to purchase price allocations		---			---			(467	)		(467)
District reorganization		(9,229	)		9,229			---			---

Balance at end of period	$	112,823		$	81,302		$	422,079		$	616,204


	2011

Balance at beginning of period	$	122,052		$	105,870		$	398,605		$	626,527
Acquisitions		---			---			23,941			23,941
Amounts allocated to divestitures		---			(33,797	)		---			(33,797)

Balance at end of period	$	122,052		$	72,073		$	422,546		$	616,671

Intangible Assets Subject to Amortization

Intangible assets subject to amortization consist of the following:


December 31	Gross Amount		Accumulated Amortization			Net Balance
(add 000)	2012
Noncompetition agreements	$	6,560	$	(5,476	)	$	1,084
Customer relationships		20,160		(4,100	)		16,060
Use rights and other		15,865		(6,416	)		9,449
Total	$	42,585	$	(15,992	)	$	26,593

	2011
Noncompetition agreements	$	6,984	$	(5,447	)	$	1,537
Customer relationships		20,160		(2,070	)		18,090
Use rights and other		15,865		(5,307	)		10,558
Total	$	43,009	$	(12,824	)	$	30,185

Intangible Assets Deemed to Indefinite Life and Not Being Amortized

Intangible assets deemed to have an indefinite life and not being amortized consist of the following:


December 31	Aggregates Business		Specialty Products		Total
(add 000)	2012
Use rights	$	21,275	$	--	$	21,275
Trade name		--		2,565		2,565
Total	$	21,275	$	2,565	$	23,840

	2011
Use rights	$	21,383	$	--	$	21,383
Trade name		--		2,565		2,565
Total	$	21,383	$	2,565	$	23,948

Other Intangibles for Aggregates Business

other intangibles for its Aggregates business, consisting of the following:


	Amount		Weighted-average amortization period
(add 000)	2011
Subject to amortization:
Noncompetition agreements	$	180	7.0 years
Customer relationships		16,610	11.6 years
Use rights and other		7,410	19.5 years
		24,200	14.0 years

Not subject to amortization:
Use rights		14,583	N/A
Total	$	38,783

Estimated Amortization Expense for Intangible Assets

The estimated amortization expense for intangible assets for each of the next five years and thereafter is as follows:


(add 000)
2013	$	3,508
2014		3,214
2015		2,568
2016		2,337
2017		2,211
Thereafter		12,755
Total	$	26,593

- Definition

Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.

+ References + Details

Business Combinations and Discontinued Operations (Tables)

12 Months Ended

Dec. 31, 2012

Components of Discontinued operations

Discontinued operations consist of the following:


years ended December 31
(add 000)	2012			2011			2010
Net sales	$	53		$	64,645		$	75,493

Pretax loss on operations	$	(402	)	$	(3,778	)	$	(1,658	)
Pretax (loss) gain on disposals		(354	)		9,986			(4	)
Pretax (loss) gain		(756	)		6,208			(1,662	)
Income tax (benefit) expense		(320	)		2,207			(1,570	)
Net (loss) earnings	$	(436	)	$	4,001		$	(92	)

- Definition

Tabular disclosure of disposal groups, which may include the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss), amounts of revenues and pretax profit or loss reported in discontinued operations, the classification and carrying value of the assets and liabilities comprising the disposal group, and the segment in which the disposal group was reported. Also may include the amount of adjustments to amounts previously reported in discontinued operations such as resolution of contingencies arising from the disposal transaction or the operations of the component prior to disposal.

+ References + Details

Accounts Receivable, Net (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Accounts Receivable Net


December 31
(add 000)	2012			2011
Customer receivables	$	226,577		$	197,611
Other current receivables		3,542			11,432
		230,119			209,043
Less allowances		(6,069	)		(5,295	)
Total	$	224,050		$	203,748

Inventories, Net (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Inventories Net


December 31
(add 000)	2012			2011
Finished products	$	355,881		$	350,685
Products in process and raw materials		16,442			11,116
Supplies and expendable parts		56,805			53,287
		429,128			415,088
Less allowances		(96,817	)		(92,481	)
Total	$	332,311		$	322,607

Property, Plant and Equipment, Net (Tables)

12 Months Ended

Dec. 31, 2012

Property, Plant and Equipment, Net


December 31
(add 000)	2012			2011
Land and land improvements	$	645,095		$	620,940
Mineral reserves and interests		430,884			421,820
Buildings		116,332			111,796
Machinery and equipment		2,511,222			2,407,045
Construction in progress		109,054			127,091
		3,812,587			3,688,692
Less allowances for depreciation, depletion and amortization		(2,059,346	)		(1,914,401	)
Total	$	1,753,241		$	1,774,291

Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2012

Long-Term Debt


December 31
(add 000)	2012			2011
6.6% Senior Notes, due 2018	$	298,677		$	298,476
7% Debentures, due 2025		124,443			124,417
6.25% Senior Notes, due 2037		228,114			247,915
Term Loan Facility, due 2015, interest rate of 2.21% and 2.20% at December 31, 2012 and 2011, respectively		245,000			250,000
Revolving Facility, interest rate of 1.91% and 2.64% at December 31, 2012 and 2011, respectively		50,000			35,000
AR Credit Facility, interest rate of 1.00% and 1.66% at December 31, 2012 and 2011, respectively		100,000			100,000
Other notes		1,625			4,276
Total		1,047,859			1,060,084
Less current maturities		(5,676	)		(7,182	)
Long-term debt	$	1,042,183		$	1,052,902

Commitments Amounts Under Senior Unsecured Credit Facilities

The Senior Unsecured Credit Facilities are syndicated with the following banks:


(add 000) Lender	Revolving Facility Commitment		Term Loan Facility Commitment
JPMorgan Chase Bank, N.A.	$	46,667	$	33,333
Wells Fargo Bank, N.A.		46,667		33,333
SunTrust Bank		46,667		33,333
Branch Banking and Trust Company		46,667		33,333
Bank of America, N.A.		46,667		33,333
Citibank, N.A.		29,167		20,833
Deutsche Bank AG New York Branch		29,167		20,833
The Northern Trust Company		29,167		20,833
Comerica Bank		14,582		10,418
Regions Bank		14,582		10,418

Total	$	350,000	$	250,000

Schedule Principal Amount, Effective Interest Rate and Maturity Date of Debentures and Senior Notes

The principal amount, effective interest rate and maturity date for the Corporation’s Debentures and Senior Notes are as follows:


	Principal Amount (add 000)		Effective Interest Rate	Maturity Date
6.6% Senior Notes	$	300,000	6.81%	April 15, 2018
7% Debentures	$	125,000	7.12%	December 1, 2025
6.25% Senior Notes	$	230,000	6.45%	May 1, 2037

Corporation's Long-Term Debt Maturities

The Corporation’s long-term debt maturities for the five years following December 31, 2012, and thereafter are:


(add 000)
2013	$	5,676
2014		5,229
2015		385,207
2016		145
2017		47
Thereafter		651,555
Total	$	1,047,859

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21538-112644

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 22
-Article 5

+ Details

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2012

Components of Tax Expense (benefit) on Income From Continuing Operations

The components of the Corporation’s tax expense (benefit) on income from continuing operations are as follows:


years ended December 31
(add 000)	2012			2011			2010
Federal income taxes:
Current	$	(2,926	)	$	15,968		$	10,534
Deferred		12,581			4,080			14,779
Total federal income taxes		9,655			20,048			25,313
State income taxes:
Current		373			2,827			1,988
Deferred		1,670			(882	)		3,429
Total state income taxes		2,043			1,945			5,417
Foreign income taxes:
Current		4,062			(1,006	)		(260	)
Deferred		1,190			--			443
Total foreign income taxes		5,252			(1,006	)		183
Total taxes on income	$	16,950		$	20,987		$	30,913

Summary of Effective Income Tax Rate on Continuing Operations

The Corporation’s effective income tax rate on continuing operations varied from the statutory United States income tax rate because of the following permanent tax differences:


years ended December 31	2012			2011			2010
Statutory tax rate		35.0	%		35.0	%		35.0	%
Increase (reduction) resulting from:
Effect of statutory depletion		(17.8	)		(17.5	)		(12.8	)
State income taxes		1.3			1.3			2.7
Foreign valuation allowance		(3.4	)		2.6			0.8
Foreign taxes, other		0.5			0.8			(0.2	)
Domestic production deduction		0.1			(1.6	)		(1.6	)
Advanced pricing agreement		1.0			--			--
Medicare subsidy		(0.1	)		0.2			1.8
Other items		(0.1	)		0.1			(1.9	)

Effective income tax rate		16.5	%		20.9	%		23.8	%

Deferred Tax Assets and Liabilities

The principal components of the Corporation’s deferred tax assets and liabilities are as follows:


December 31	Deferred Assets (Liabilities)
(add 000)	2012			2011
Deferred tax assets related to:
Employee benefits	$	33,258		$	37,903
Inventories		54,555			60,462
Valuation and other reserves		17,752			14,882
Net operating loss carryforwards		8,891			10,835
Other items, net		1,511			--

Gross deferred tax assets		115,967			124,082
Valuation allowance on deferred tax assets		(6,572	)		(9,402	)

Total net deferred tax assets		109,395			114,680

Deferred tax liabilities related to:
Property, plant and equipment		(260,190	)		(258,433	)
Goodwill and other intangibles		(70,669	)		(54,782	)
Other items, net		--			(1,132	)

Total deferred tax liabilities		(330,859	)		(314,347	)

Net deferred tax liability	$	(221,464	)	$	(199,667	)

Deferred Tax Assets and (Liabilities) Recognized

The Corporation’s deferred tax assets and (liabilities) are recognized on the consolidated balance sheets as follows:


December 31
(add 000)	2012			2011
Current deferred income tax benefits	$	77,716		$	80,674
Noncurrent deferred income taxes		(225,592	)		(222,064	)

Net deferred income taxes	$	(147,876	)	$	(141,390	)

Schedule Of Unrecognized Tax Benefits

The following table summarizes the Corporation’s unrecognized tax benefits, excluding interest and correlative effects:


years ended December 31 (add 000)	2012			2011			2010
Unrecognized tax benefits at beginning of year	$	9,288		$	11,011		$	16,722
Gross increases – tax positions in prior years		19,434			1,217			19,619
Gross decreases – tax positions in prior years		(13,876	)		(1,510	)		(3,258	)
Gross increases – tax positions in current year		1,555			6,274			6,462
Gross decreases – tax positions in current year		--			(4,625	)		(5,135	)
Settlements with taxing authorities		(1,021	)		(3,079	)		(12,573	)
Lapse of statute of limitations		--			--			(10,826	)

Unrecognized tax benefits at end of year	$	15,380		$	9,288		$	11,011

- Definition

Tabular disclosure of tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities (i.e., uncertain tax positions) and other types of income tax contingencies, including: (1) the policy on classification of interest and penalties; (2) a tabular reconciliation of the total amounts of unrecognized tax benefits at the beginning and end of the period; the total amount(s) of: (3) unrecognized tax benefits that, if recognized, would affect the effective tax rate, and (4) interest and penalties recognized in each of the income statement and balance sheet; (5) for positions for which it is reasonably possible that the total amounts unrecognized will significantly change within 12 months of the reporting date the: (i) nature of the uncertainty, (ii) nature of the event that could occur that would cause the change, and (iii) an estimate of the range of the reasonably possible change or a statement that an estimate of the range cannot be made; and (6) a description of tax years that remain subject to examination by major tax jurisdictions.

+ References + Details

Retirement Plans, Postretirement and Postemployment Benefits (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Accumulated Benefit Obligations in Excess of Plan Assets

Benefit obligations and fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets are as follows:

December 31


(add 000)	2012		2011
Projected benefit obligation	$	535,783	$	457,175
Accumulated benefit obligation	$	481,865	$	417,771
Fair value of plan assets	$	376,443	$	325,150

Schedule of Weighted-Average Assumptions

Weighted-average assumptions used to determine benefit obligations as of December 31 are:


	2012			2011
Discount rate		4.24	%		5.14	%
Rate of increase in future compensation levels		5.00	%		5.00	%

Weighted-average assumptions used to determine net periodic benefit cost for years ended December 31 are:


	2012			2011			2010
Discount rate		5.14	%		5.84	%		5.90	%
Rate of increase in future compensation levels		5.00	%		5.00	%		5.00	%
Expected long-term rate of return on assets		7.25	%		7.75	%		7.75	%

Schedule of Target Assets Allocation

The target allocation for 2012 and the actual pension plan asset allocation by asset class are as follows:


	Percentage of Plan Assets
				December 31
Asset Class	2012 Target Allocation			2012			2011
Equity securities		56	%		57	%		57	%
Debt securities		34	%		33	%		34	%
Hedge funds		5	%		5	%		4	%
Real estate		5	%		5	%		5	%
Cash		--			--			--

Total		100	%		100	%		100	%

Fair Values of Pension Plan Assets by Asset Class and Fair Value Hierarchy Level

The fair values of pension plan assets by asset class and fair value hierarchy level are as follows:


December 31	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Fair Value
(add 000)	2012
Equity securities:
Mid-sized to large cap	$	--	$	150,742	$	--	$	150,742
International and emerging growth funds		--		63,003		--		63,003
Debt securities:
Core fixed income		--		105,972		--		105,972
High-yield bonds		--		19,487		--		19,487
Real estate		--		17,606		--		17,606
Hedge funds		--		--		19,252		19,252
Cash		381		--		--		381
Total	$	381	$	356,810	$	19,252	$	376,443

2011
Equity securities:
Mid-sized to large cap	$	--	$	133,512	$	--	$	133,512
International and emerging growth funds		--		50,518		--		50,518
Debt securities:
Core fixed income		--		94,745		--		94,745
High-yield bonds		--		17,096		--		17,096
Real estate		--		15,841		--		15,841
Hedge funds		--		--		12,979		12,979
Cash		459		--		--		459
Total	$	459	$	311,712	$	12,979	$	325,150

Change in Fair Value of Pension Plan Assets

The change in the fair value of pension plan assets valued using significant unobservable inputs (Level 3) is as follows:


year ended December 31 (add 000)	2012		2011
Balance at January 1	$	12,979	$	13,453
Purchases		5,500		--
Unrealized gain (loss)		773		(474	)
Balance at December 31	$	19,252	$	12,979

Schedule of Assumed Health Care Cost Trend Rates

Assumed health care cost trend rates at December 31 are:


	2012			2011
Health care cost trend rate assumed for next year		8.0	%		7.5	%
Rate to which the cost trend rate gradually declines		5.0	%		5.0	%
Year the rate reaches the ultimate rate		2019			2017

Schedule of One Percentage-Point Change in Assumed Health Care Cost Trend Rates

A one percentage-point change in assumed health care cost trend rates would have the following effects:


	One Percentage Point
(add 000)	Increase		(Decrease)
Total service and interest cost components	$	59	$	(51	)
Postretirement benefit obligation	$	1,525	$	(1,299	)

Pension [Member]

Schedule of Components of Net Periodic Benefit Cost

The net periodic retirement benefit cost of defined benefit plans includes the following components:

years ended December 31


(add 000)	2012			2011			2010
Components of net periodic benefit cost:
Service cost	$	13,084		$	11,270		$	11,056
Interest cost		23,653			23,178			22,588
Expected return on assets		(23,899	)		(24,493	)		(21,041	)
Amortization of:
Prior service cost		466			534			583
Actuarial loss		12,417			6,324			9,986
Transition asset		(1	)		(1	)		(1	)
Settlement charge		779			375			3,455

Net periodic benefit cost	$	26,499		$	17,187		$	26,626

Schedule of Recognized Comprehensive Earnings

The Corporation recognized the following amounts in consolidated comprehensive earnings:

years ended December 31


(add 000)	2012			2011			2010
Actuarial loss (gain)	$	47,877		$	65,334		$	(10,915	)
Amortization of:
Prior service cost		(466	)		(534	)		(583	)
Actuarial loss		(12,417	)		(6,324	)		(9,986	)
Transition asset		1			1			1
Settlement charge		(779	)		(375	)		(3,455	)

Total	$	34,216		$	58,102		$	(24,938	)

Schedule of Net Periodic Benefit Cost Not Yet Recognized

Accumulated other comprehensive loss includes the following amounts that have not yet been recognized in net periodic benefit cost:

December 31


	2012						2011

(add 000)	Gross			Net of tax			Gross			Net of tax
Prior service cost	$	2,089		$	1,263		$	2,555		$	1,545
Actuarial loss		191,675			115,868			156,994			94,903
Transition asset		(11	)		(7	)		(12	)		(7	)

Total	$	193,753		$	117,124		$	159,537		$	96,441

Schedule of Change in Projected Benefit Obligation

The defined benefit plans’ change in projected benefit obligation is as follows:

years ended December 31


(add 000)	2012			2011
Change in projected benefit obligation:
Net projected benefit obligation at beginning of year	$	457,175		$	398,638
Service cost		13,084			11,270
Interest cost		23,653			23,178
Actuarial loss		61,286			41,971
Gross benefits paid		(19,415	)		(17,882	)

Net projected benefit obligation at end of year	$	535,783		$	457,175

Schedule of Change In Plan Aassets

The Corporation’s change in plan assets, funded status and amounts recognized on the Corporation’s consolidated balance sheets are as follows:

years ended December 31


(add 000)	2012			2011
Change in plan assets:
Fair value of plan assets at beginning of year	$	325,150		$	311,688
Actual return on plan assets, net		37,308			1,129
Employer contributions		33,400			30,215
Gross benefits paid		(19,415	)		(17,882	)

Fair value of plan assets at end of year	$	376,443		$	325,150

Schedule of Funded Status

December 31


(add 000)	2012			2011
Funded status of the plan at end of year	$	(159,340	)	$	(132,025	)

Accrued benefit cost	$	(159,340	)	$	(132,025	)

Schedule of Amounts Recognized on Consolidated Balance Sheets

December 31


(add 000)	2012			2011
Amounts recognized on consolidated balance sheets consist of:
Current liability	$	(2,871	)	$	(2,320	)
Noncurrent liability		(156,469	)		(129,705	)

Net amount recognized at end of year	$	(159,340	)	$	(132,025	)

Schedule of Expected Benefit Payments

The expected benefit payments to be paid from plan assets for each of the next five years and the five-year period thereafter are as follows:


(add 000)
2013	$	19,589
2014	$	21,126
2015	$	23,028
2016	$	24,892
2017	$	26,631
Years 2018 - 2022	$	156,728

Postretirement Benefits [Member]

Schedule of Components of Net Periodic Benefit Cost

The net periodic postretirement benefit (credit) cost of postretirement plans includes the following components:


years ended December 31 (add 000)	2012			2011			2010
Components of net periodic benefit (credit) cost:
Service cost	$	227		$	350		$	548
Interest cost		1,234			2,225			2,754
Amortization of:
Prior service credit		(3,255	)		(1,740	)		(1,740	)
Actuarial (gain) loss		(283	)		(85	)		13
Total net periodic benefit (credit) cost	$	(2,077	)	$	750		$	1,575

Schedule of Recognized Comprehensive Earnings

The Corporation recognized the following amounts in consolidated comprehensive earnings:


years ended December 31 (add 000)	2012		2011			2010
Actuarial loss (gain)	$	1,993	$	(3,884	)	$	(4,133	)
Prior service credit		--		(10,397	)		(1,722	)
Amortization of:
Prior service credit		3,255		1,740			1,740
Actuarial gain (loss)		283		85			(13	)
Total	$	5,531	$	(12,456	)	$	(4,128	)

Schedule of Net Periodic Benefit Cost Not Yet Recognized

Accumulated other comprehensive loss includes the following amounts that have not yet been recognized in net periodic benefit cost:


December 31 (add 000)	2012						2011
December 31 (add 000)	Gross			Net of tax			Gross			Net of tax
Prior service credit	$	(13,598	)	$	(8,220	)	$	(16,853	)	$	(10,188	)
Actuarial gain		(934	)		(565	)		(3,210	)		(1,940	)
Total	$	(14,532	)	$	(8,785	)	$	(20,063	)	$	(12,128	)

Schedule of Change in Projected Benefit Obligation

The postretirement health care plans’ change in benefit obligation is as follows:

years ended December 31


(add 000)	2012			2011
Change in benefit obligation:
Net benefit obligation at beginning of year	$	29,635		$	45,210
Service cost		227			350
Interest cost		1,234			2,225
Participants’ contributions		2,528			1,925
Actuarial loss (gain)		1,993			(3,884	)
Plan amendments		--			(10,397	)
Gross benefits paid		(6,522	)		(6,250	)
Federal subsidy on benefits paid		--			456
Net benefit obligation at end of year	$	29,095		$	29,635

Schedule of Change In Plan Aassets

The Corporation’s change in plan assets, funded status and amounts recognized on the Corporation’s consolidated balance sheets are as follows:

years ended December 31


(add 000)	2012			2011
Change in plan assets:
Fair value of plan assets at beginning of year	$	--		$	--
Employer contributions		3,994			3,869
Participants’ contributions		2,528			1,925
Gross benefits paid		(6,522	)		(6,250	)
Federal subsidy on benefits paid		--			456
Fair value of plan assets at end of year	$	--		$	--

Schedule of Funded Status

December 31


(add 000)	2012			2011
Funded status of the plan at end of year	$	(29,095	)	$	(29,635	)
Accrued benefit cost	$	(29,095	)	$	(29,635	)

Schedule of Amounts Recognized on Consolidated Balance Sheets

December 31


(add 000)	2012			2011
Amounts recognized on consolidated balance sheets consist of:
Current liability	$	(3,980	)	$	(2,930	)
Noncurrent liability		(25,115	)		(26,705	)
Net amount recognized at end of year	$	(29,095	)	$	(29,635	)

Schedule of Weighted-Average Assumptions

Weighted-average assumptions used to determine the postretirement benefit obligations as of December 31 are:


	2012			2011
Discount rate		3.54	%		4.44	%

Weighted-average assumptions used to determine net postretirement benefit cost for the years ended December 31 are:


	2012			2011			2010
Discount rate		4.44	%		5.57	%		5.60	%

Schedule of Expected Benefit Payments

The total expected benefit payments to be paid by the Corporation, net of participant contributions, for each of the next five years and the five-year period thereafter are as follows:


(add 000)	Benefit Payments
2013	$	3,980
2014	$	2,820
2015	$	2,866
2016	$	2,816
2017	$	2,718
Years 2018 - 2022	$	11,604

Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2012

Summary Information for Stock Options

The following table includes summary information for stock options as of December 31, 2012:


	Number of Options			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life (years)
Outstanding at January 1, 2012		1,151,567		$	89.93
Granted		71,686		$	69.12
Exercised		(188,631	)	$	48.06
Terminated		(6,665	)	$	100.73
Outstanding at December 31, 2012		1,027,957		$	96.10		3.4
Exercisable at December 31, 2012		854,178		$	99.52		2.8

Summarizes Information for Incentive Stock Awards and Restricted Stock Awards

The following table summarizes information for incentive stock awards and restricted stock awards as of December 31, 2012:


	Incentive Stock					Restricted Stock
	Number of Awards			Weighted- Average Grant-Date Fair Value		Number of Awards			Weighted- Average Grant-Date Fair Value
January 1, 2012		31,700		$	81.04		305,088		$	95.72
Awarded		12,702		$	81.41		58,918		$	69.12
Distributed		(15,520	)	$	80.55		(119,328	)	$	111.92
Forfeited		(1,155	)	$	82.49		(6,084	)	$	90.06
December 31, 2012		27,727		$	81.42		238,594		$	81.19

Schedule of Stock-Based Compensation Expense


(add 000, except year data)	Stock Options		Restricted Stock Awards		Incentive Compensation Awards		Directors’ Awards		Total
Stock-based compensation expense recognized for years ended December 31:
2012	$	1,835	$	4,980	$	237	$	729	$	7,781
2011	$	2,602	$	7,929	$	272	$	719	$	11,522
2010	$	3,406	$	10,368	$	261	$	640	$	14,675
Unrecognized compensation cost at December 31, 2012:	$	1,473	$	4,400	$	51	$	—	$	5,924
Weighted-average period over which unrecognized compensation cost to be recognized:		1.9 years		2.1 years		1.5 years		—

Expected Stock-Based Compensation Expense in Future Periods for Outstanding Awards

The following presents expected stock-based compensation expense in future periods for outstanding awards as of December 31, 2012:


(add 000)
2013	$	3,199
2014		1,975
2015		720
2016		30
Total	$	5,924

Leases (Tables)

12 Months Ended

Dec. 31, 2012

Future Minimum Lease and Mineral and Other Royalty Commitments for All Noncancelable Agreements

Future minimum lease and mineral and other royalty commitments for all noncancelable agreements as of December 31, 2012 are as follows:


(add 000)
2013	$	75,298
2014		55,706
2015		51,353
2016		38,828
2017		29,851
Thereafter		109,464
Total	$	360,500

Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Changes in Asset Retirement Obligations

The following shows the changes in the asset retirement obligations:

years ended December 31:


(add 000)	2012			2011
Balance at January 1	$	43,233		$	41,079
Accretion expense		2,712			2,645
Liabilities incurred		204			3,062
Liabilities settled		(126	)		(2,091	)
Revisions in estimated cash flows		150			(1,462	)
Balance at December 31	$	46,173		$	43,233

Schedule of Contractual Purchase Commitments

The Corporation’s contractual purchase commitments as of December 31, 2012 are as follows:


(add 000)
2013	$	41,496
2014		8,659
2015		229
Total	$	50,384

Business Segments (Tables)

12 Months Ended

Dec. 31, 2012

Financial Data for Continuning Operation For the Corporation's Reportable Business Segments

The following tables display selected financial data for the Corporation’s reportable business segments.

Selected Financial Data by Business Segment

years ended December 31

(add 000)


Total revenues	2012			2011			2010
Mideast Group	$	445,097		$	430,638		$	420,618
Southeast Group		304,524			306,436			336,351
West Group		1,067,333			757,548			702,657
Total Aggregates Business		1,816,954			1,494,622			1,459,626
Specialty Products		220,713			219,123			193,180
Total	$	2,037,667		$	1,713,745		$	1,652,806

Net sales
Mideast Group	$	406,651		$	395,470		$	390,581
Southeast Group		282,161			283,287			303,174
West Group		947,694			640,551			605,537
Total Aggregates Business		1,636,506			1,319,308			1,299,292
Specialty Products		202,217			200,575			176,346
Total	$	1,838,723		$	1,519,883		$	1,475,638

Gross profit (loss)
Mideast Group	$	108,876		$	104,204		$	109,865
Southeast Group		10,755			21,009			46,062
West Group		134,503			104,749			108,333
Total Aggregates Business		254,134			229,962			264,260
Specialty Products		77,223			75,405			61,685
Corporate		(5,441	)		(3,395	)		(4,294	)
Total	$	325,916		$	301,972		$	321,651

Selling, general and administrative expenses
Mideast Group	$	36,928		$	37,762		$	36,914
Southeast Group		22,832			26,873			27,709
West Group		56,664			43,879			42,861
Total Aggregates Business		116,424			108,514			107,484
Specialty Products		9,295			9,197			11,046
Corporate		12,679			6,427			11,892
Total	$	138,398		$	124,138		$	130,422

Earnings (Loss) from operations
Mideast Group	$	75,028		$	69,723		$	75,261
Southeast Group		(13,470	)		(5,884	)		17,924
West Group		81,975			63,592			75,330
Total Aggregates Business		143,533			127,431			168,515
Specialty Products		68,542			66,305			50,578
Corporate		(57,122	)		(32,757	)		(20,786	)
Total	$	154,953		$	160,979		$	198,307

Assets employed
Mideast Group	$	724,945		$	753,005		$	758,735
Southeast Group		652,567			663,321			836,695
West Group		1,413,838			1,389,746			1,102,798
Total Aggregates Business		2,791,350			2,806,072			2,698,228
Specialty Products		157,673			120,305			102,103
Corporate		211,903			221,445			274,412
Total	$	3,160,926		$	3,147,822		$	3,074,743

Depreciation, depletion and amortization
Mideast Group	$	44,189		$	46,668		$	50,524
Southeast Group		39,007			51,090			56,622
West Group		78,271			59,419			56,705
Total Aggregates Business		161,467			157,177			163,851
Specialty Products		7,838			7,075			8,385
Corporate		7,906			9,155			9,301
Total	$	177,211		$	173,407		$	181,537



years ended December 31 (add 000) Total property additions	2012		2011		2010
Mideast Group	$	32,179	$	39,504	$	50,869
Southeast Group		29,541		29,531		54,138
West Group		47,233		243,195		58,819
Total Aggregates Business		108,953		312,230		163,826
Specialty Products		38,873		21,983		6,431
Corporate		3,887		6,340		1,823
Total	$	151,713	$	340,553	$	172,080

Property additions through acquisitions
Mideast Group	$	--	$	--	$	12,912
Southeast Group		--		--		20,902
West Group		--		40,229		--
Total Aggregates Business		--		40,229		33,814
Specialty Products		--		--		--
Corporate		--		--		--
Total	$	--	$	40,229	$	33,814

Net Sales by Product Line

Total revenues, net sales and gross profit by product line are as follows:

years ended December 31

(add 000)


Total revenues	2012		2011		2010
Aggregates	$	1,470,953	$	1,372,243	$	1,365,729
Asphalt		93,288		63,942		51,055
Ready Mixed Concrete		116,328		33,075		25,067
Road Paving		136,385		25,362		17,775
Total Aggregates Business		1,816,954		1,494,622		1,459,626
Magnesia-Based Chemicals		158,752		158,255		132,891
Dolomitic Lime		60,280		59,496		58,630
Other		1,681		1,372		1,659
Total Specialty Products		220,713		219,123		193,180
Total	$	2,037,667	$	1,713,745	$	1,652,806

Net sales
Aggregates	$	1,303,975	$	1,213,635	$	1,218,569
Asphalt		79,816		47,315		37,917
Ready Mixed Concrete		116,320		32,990		25,031
Road Paving		136,395		25,368		17,775
Total Aggregates Business		1,636,506		1,319,308		1,299,292
Magnesia-Based Chemicals		142,922		142,620		120,475
Dolomitic Lime		57,614		56,582		54,212
Other		1,681		1,373		1,659
Total Specialty Products		202,217		200,575		176,346
Total	$	1,838,723	$	1,519,883	$	1,475,638

years ended December 31

(add 000)


Gross profit (loss)	2012			2011			2010
Aggregates	$	240,614		$	223,275		$	254,290
Asphalt		12,099			5,836			8,988
Ready Mixed Concrete		(1,159	)		(250	)		(508	)
Road Paving		2,580			1,101			1,490
Total Aggregates Business		254,134			229,962			264,260
Magnesia-Based Chemicals		54,508			50,726			39,821
Dolomitic Lime		22,316			24,548			24,041
Other		399			131			(2,177	)
Total Specialty Products		77,223			75,405			61,685
Corporate		(5,441	)		(3,395	)		(4,294	)
Total	$	325,916		$	301,972		$	321,651

Domestic and Foreign Total Revenues

Domestic and foreign total revenues are as follows:

years ended December 31


(add 000)	2012		2011		2010
Domestic	$	1,996,142	$	1,671,999	$	1,618,715
Foreign		41,525		41,746		34,091
Total	$	2,037,667	$	1,713,745	$	1,652,806

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References + Details

Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2012

Components of Change in Other Assets and Liabilities, Net

The components of the change in other assets and liabilities, net, are as follows:

years ended December 31


(add 000)	2012			2011			2010
Other current and noncurrent assets	$	(2,354	)	$	2,439		$	3,245
Accrued salaries, benefits and payroll taxes		7			(4,722	)		(1,415	)
Accrued insurance and other taxes		2,274			2,873			(739	)
Accrued income taxes		(13,343	)		6,139			10,890
Accrued pension, postretirement and postemployment benefits		(13,904	)		(16,378	)		(22,257	)
Other current and noncurrent liabilities		3,836			(3,092	)		(3,491	)
Change in other assets and liabilities	$	(23,484	)	$	(12,741	)	$	(13,767	)

Schedule of Noncash Investing and Financing Activities

Noncash investing and financing activities are as follows:

years ended December 31


(add 000)	2012		2011		2010
Noncash investing and financing activities:
Acquisition of assets through asset exchange	$	690	$	150,000	$	--
Acquisition of land through property exchange	$	--	$	--	$	1,900
Issuance of notes payable for acquisition of land	$	--	$	--	$	450

Accounting Policies - Additional Information (Detail)	12 Months Ended
Accounting Policies - Additional Information (Detail)	Dec. 31, 2012 USD ($) State $ / shares	Dec. 31, 2011 USD ($) $ / shares	Dec. 31, 2010 $ / shares
Significant Accounting Policies [Line Items]
Number of quarries distribution facilities and plants	300
Number of states with aggregates business sales by destination \| State	33
Percentage of aggregates business net sales in top five sales states	57.00%
Maximum FDIC, insurance limit to not available of funds in lockboxes	$ 250,000
Company policy for maximum cash maintained at one bank	$ 100,000,000
Minimum deposit at bank related to guarantee of affiliate	An amount greater than or equal to $5,000,000
Depository accounts at Fifth Third Bank	$ 5,023,000	$ 5,014,000
Minimum at risk receivable balance for specific reserve	$ 50,000
Weighted-average fair value of stock option granted \| $ / shares	$ 22.18	$ 29.94	$ 33.95
Minimum likelihood for recognition of tax benefit related to uncertain tax position	50.00%
Minimum
Significant Accounting Policies [Line Items]
Warranty term	9 months
Minimum \| Certain construction contracts
Significant Accounting Policies [Line Items]
Warranty term	2 years
Maximum
Significant Accounting Policies [Line Items]
Warranty term	1 year
Maximum \| Certain construction contracts
Significant Accounting Policies [Line Items]
Warranty term	10 years
Aggregates Product Line
Significant Accounting Policies [Line Items]
Total net sales	71.00%
Vertically Integrated
Significant Accounting Policies [Line Items]
Total net sales	18.00%
Specialty Products
Significant Accounting Policies [Line Items]
Total net sales	11.00%

Estimated Service Lives of Property, Plant and Equipment (Detail)	12 Months Ended
	Dec. 31, 2012
Building \| Minimum
Property Plant and Equipment Estimated Useful Lives [Line Items]
Property, plant and equipment, Service Lives,Years	4 years
Building \| Maximum
Property Plant and Equipment Estimated Useful Lives [Line Items]
Property, plant and equipment, Service Lives,Years	50 years
Machinery and Equipment \| Minimum
Property Plant and Equipment Estimated Useful Lives [Line Items]
Property, plant and equipment, Service Lives,Years	2 years
Machinery and Equipment \| Maximum
Property Plant and Equipment Estimated Useful Lives [Line Items]
Property, plant and equipment, Service Lives,Years	35 years
Land Improvements \| Minimum
Property Plant and Equipment Estimated Useful Lives [Line Items]
Property, plant and equipment, Service Lives,Years	4 years
Land Improvements \| Maximum
Property Plant and Equipment Estimated Useful Lives [Line Items]
Property, plant and equipment, Service Lives,Years	30 years

Fair Value of Stock Options Awarded (Detail)	12 Months Ended
Fair Value of Stock Options Awarded (Detail)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Risk-free interest rate	1.38%	2.82%	2.97%
Dividend yield	2.10%	1.90%	1.80%
Volatility factor	37.50%	36.70%	37.30%
Expected term	7 years 3 months 18 days	7 years 2 months 12 days	7 years 2 months 12 days

Components of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Accumulated Other Comprehensive Income (Loss)
Unrecognized actuarial losses, prior service costs and transition assets related to pension and postretirement benefits	$ (108,189)	$ (84,204)	$ (54,245)
Foreign currency translation gains	6,157	5,076	5,929
Unamortized value of terminated forward starting interest rate swap agreements	(4,137)	(4,762)	(5,344)
Accumulated other comprehensive loss	$ (106,169)	$ (83,890)	$ (53,660)

- Definition

Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

+ References + Details

- Definition

The total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.

+ References

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+ Details

- Definition

Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses.

+ References

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+ Details

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References

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-Number 210
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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+ Details

Accumulated Other Comprehensive Loss Net Of Noncurrent Deferred Tax Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Deferred Tax Liability Not Recognized [Line Items]
Unrecognized actuarial losses, prior service costs and transition assets related to pension and postretirement benefits	$ 70,881	$ 55,161	$ 39,501
Unamortized value of terminated forward starting interest rate swap agreements	2,707	3,116	3,497
Cumulative noncurrent deferred tax assets	$ 73,588	$ 58,277	$ 42,998

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from unrealized losses in other comprehensive income.

+ References

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+ Details

Basic and Diluted Earnings Per Common Share (Detail) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule of Earnings Per Share, Basic and Diluted, by Common Class
Net earnings from continuing operations attributable to Martin Marietta Materials, Inc.	$ 84,910	$ 78,378	$ 97,104
Less: Distributed and undistributed earnings attributable to unvested awards	(500)	(657)	(993)
Basic and diluted net earnings attributable to common shareholders from continuing operations attributable to Martin Marietta Materials, Inc.	84,410	77,721	96,111
Basic and diluted net (loss) earnings attributable to common shareholders from discontinued operations	(436)	4,001	(92)
Basic and diluted net earnings attributable to common shareholders attributable to Martin Marietta Materials, Inc.	$ 83,974	$ 81,722	$ 96,019
Basic weighted-average common shares outstanding	45,828	45,652	45,485
Effect of dilutive employee and director awards	142	141	174
Diluted weighted-average common shares outstanding	45,970	45,793	45,659

- Definition

Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Paragraph 38
-Subparagraph b(1)
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 29
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 28
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

Amount of income (loss) from a disposal group, net of income tax, reported as a separate component of income before extraordinary items after deduction or consideration of the amount allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

+ References + Details

- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References + Details

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1448-109256

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Weighted-Average Number of Common Shares Outstanding
-URI http://asc.fasb.org/extlink&oid=6528421

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 07-4
-Paragraph 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 171
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 40
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Changes In Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
Changes In Goodwill (Detail) - USD ($) $ in Thousands	Dec. 31, 2012	Dec. 31, 2011
Goodwill
Balance at beginning of period	$ 616,671	$ 626,527
Adjustments to purchase price allocations	(467)
Acquisitions		23,941
Amounts allocated to divestitures		(33,797)
Balance at end of period	616,204	616,671
Mideast Group
Goodwill
Balance at beginning of period	122,052	122,052
District reorganization	(9,229)
Balance at end of period	112,823	122,052
Southeast Group
Goodwill
Balance at beginning of period	72,073	105,870
District reorganization	9,229
Amounts allocated to divestitures		(33,797)
Balance at end of period	81,302	72,073
West Group
Goodwill
Balance at beginning of period	422,546	398,605
Adjustments to purchase price allocations	(467)
Acquisitions		23,941
Balance at end of period	$ 422,079	$ 422,546

- Definition

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 43
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 72
-Subparagraph d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e
-Clause 1
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 68
-Subparagraph l
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 34
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Changes In Goodwill - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Goodwill And Other Intangibles [Line Items]
Acquisitions		$ 23,941,000
Amounts allocated to divestitures		33,797,000
Other intangibles acquired		38,783,000
Amortization expense of intangible assets	$ 3,593,000	$ 1,812,000	$ 1,453,000

Intangible Assets Subject to Amortization (Detail) - USD ($) $ in Thousands	Dec. 31, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 42,585	$ 43,009
Accumulated Amortization	(15,992)	(12,824)
Net Balance	26,593	30,185
Noncompetition agreements
Finite-Lived Intangible Assets [Line Items]
Gross Amount	6,560	6,984
Accumulated Amortization	(5,476)	(5,447)
Net Balance	1,084	1,537
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross Amount	20,160	20,160
Accumulated Amortization	(4,100)	(2,070)
Net Balance	16,060	18,090
Use Rights And Other
Finite-Lived Intangible Assets [Line Items]
Gross Amount	15,865	15,865
Accumulated Amortization	(6,416)	(5,307)
Net Balance	$ 9,449	$ 10,558

Intangible Assets Deemed to Have Indefinite Life and Not Being Amortized (Detail) - USD ($)	Dec. 31, 2012	Dec. 31, 2011
Other Intangible Assets [Line Items]
Indefinite life intangible assets	$ 23,840	$ 23,948
Use Rights
Other Intangible Assets [Line Items]
Indefinite life intangible assets	21,275	21,383
Trade Name
Other Intangible Assets [Line Items]
Indefinite life intangible assets	2,565	2,565
Aggregates Business
Other Intangible Assets [Line Items]
Indefinite life intangible assets	21,275	21,383
Aggregates Business \| Use Rights
Other Intangible Assets [Line Items]
Indefinite life intangible assets	21,275	21,383
Specialty Products
Other Intangible Assets [Line Items]
Indefinite life intangible assets	2,565	2,565
Specialty Products \| Trade Name
Other Intangible Assets [Line Items]
Indefinite life intangible assets	$ 2,565	$ 2,565

Schedule Of Acquired Other Intangibles (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2011 USD ($)
Acquisition Goodwill And Other Intangible Assets [Line Items]
Total, subject to amortization	$ 24,200
Total, Amount	$ 38,783
Acquired Finite-lived Intangible Assets, Useful Life	14 years
Use Rights
Acquisition Goodwill And Other Intangible Assets [Line Items]
Other intangibles not subject to amortization	$ 14,583
Acquired Finite-lived Intangible Assets, Useful Life	0 years
Noncompetition agreements
Acquisition Goodwill And Other Intangible Assets [Line Items]
Other intangibles subject to amortization	$ 180
Acquired Finite-lived Intangible Assets, Useful Life	7 years
Customer Relationships
Acquisition Goodwill And Other Intangible Assets [Line Items]
Other intangibles subject to amortization	$ 16,610
Acquired Finite-lived Intangible Assets, Useful Life	11 years 7 months 6 days
Use Rights And Other
Acquisition Goodwill And Other Intangible Assets [Line Items]
Other intangibles subject to amortization	$ 7,410
Acquired Finite-lived Intangible Assets, Useful Life	19 years 6 months

Estimated Amortization Expense Of Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2012	Dec. 31, 2011
Expected Amortization Expense [Line Items]
2013	$ 3,508
2014	3,214
2015	2,568
2016	2,337
2017	2,211
Thereafter	12,755
Net Balance	$ 26,593	$ 30,185

Business Combinations and Discontinued Operations - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Business Combination, Transactions [Line Items]
Acquisitions, net	$ 160	$ 91,569	$ 43,299

Discontinued Operations (Detail) - USD ($) $ in Thousands	12 Months Ended
Discontinued Operations (Detail) - USD ($) $ in Thousands	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Net sales	$ 53	$ 64,645	$ 75,493
Pretax loss on operations	(402)	(3,778)	(1,658)
Pretax (loss) gain on disposals	(354)	9,986	(4)
Pretax (loss) gain	(756)	6,208	(1,662)
Income tax (benefit) expense	(320)	2,207	(1,570)
Net (loss) earnings	$ (436)	$ 4,001	$ (92)

+ References + Details

Accounts Receivable Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2012	Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customer receivables	$ 226,577	$ 197,611
Other current receivables	3,542	11,432
Accounts Receivable, gross	230,119	209,043
Less allowances	(6,069)	(5,295)
Total	$ 224,050	$ 203,748

Inventories Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Inventory Net [Line Items]
Finished products	$ 355,881	$ 350,685
Products in process and raw materials	16,442	11,116
Supplies and expendable parts	56,805	53,287
Inventories, Gross	429,128	415,088
Less allowances	(96,817)	(92,481)
Total	$ 332,311	$ 322,607

- Definition

The amount of the valuation account as of the balance sheet date which reduces the carrying amount of inventory to net realizable value; takes into consideration such factors as market value, excessive quantities based on expected sales, technological obsolescence, and shrinkage. May also provide for estimated product returns or price concessions pertaining to product cost.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 330
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB TOPIC 5.BB)
-URI http://asc.fasb.org/extlink&oid=6386940&loc=d3e100047-122729

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.6(a))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-09)
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e24092-122690

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 330
-SubTopic 10
-Section 35
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6386567&loc=d3e3927-108312

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 43
-Paragraph 14
-Chapter 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 43
-Paragraph 8, 9, 14
-Chapter 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 43
-Section A
-Paragraph 9
-Chapter 3
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 09
-Article 12

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 6
-Subparagraph a
-Article 5

+ Details

Property Plant and Equipment Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Land and land improvements	$ 645,095	$ 620,940
Mineral reserves and interests	430,884	421,820
Buildings	116,332	111,796
Machinery and equipment	2,511,222	2,407,045
Construction in progress	109,054	127,091
Gross property, plant and equipment	3,812,587	3,688,692
Less allowances for depreciation, depletion and amortization	(2,059,346)	(1,914,401)
Net property, plant and equipment	$ 1,753,241	$ 1,774,291

- Definition

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

+ References + Details

Property Plant and Equipment Net - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Property, Plant and Equipment [Line Items]
Depreciation, depletion and amortization	$ 177,211,000	$ 173,407,000	$ 181,537,000
Capitalized interest cost	2,537,000	1,816,000	2,129,000
Bahamas And Canada
Property, Plant and Equipment [Line Items]
Net fixed assets in foreign countries	69,073,000	72,181,000
Property Plant and Equipment
Property, Plant and Equipment [Line Items]
Depreciation, depletion and amortization	$ 171,940,000	$ 169,974,000	$ 178,426,000

Long Term Debt (Detail) - USD ($)	Dec. 31, 2012	Dec. 31, 2011
Debt Instrument
Total debt	$ 1,047,859,000	$ 1,060,084,000
Less current maturities	(5,676,000)	(7,182,000)
Credit Facility	2,507,000
Long-term debt	1,042,183,000	1,052,902,000
6.6% Senior Notes, Due 2018
Debt Instrument
Total debt	298,677,000	298,476,000
7% Debentures, Due 2025
Debt Instrument
Total debt	124,443,000	124,417,000
6.25% Senior Notes, Due 2037
Debt Instrument
Total debt	228,114,000	247,915,000
Term Loan Facility, Due 2015
Debt Instrument
Total debt	245,000,000	250,000,000
Revolving Facility
Debt Instrument
Credit Facility	50,000,000	35,000,000
AR Credit Facility
Debt Instrument
Credit Facility	100,000,000	100,000,000
Other notes
Debt Instrument
Other notes	$ 1,625,000	$ 4,276,000

Long Term Debt (Parenthetical) (Detail)	1 Months Ended	12 Months Ended
Long Term Debt (Parenthetical) (Detail)	Jan. 31, 2012	Dec. 31, 2012	Dec. 31, 2011
6.6% Senior Notes, Due 2018
Debt Instrument
Maturity date		2018
Interest rate on notes		6.60%
7% Debentures, Due 2025
Debt Instrument
Maturity date		2025
Interest rate on notes		7.00%
6.25% Senior Notes, Due 2037
Debt Instrument
Maturity date	2037	2037
Interest rate on notes	6.25%	6.25%
Term Loan Facility, Due 2015
Debt Instrument
Maturity date		2015
Interest rate on term loan		2.21%	2.20%
Revolving Facility
Debt Instrument
Credit Facility interest rate		1.91%	2.64%
AR Credit Facility
Debt Instrument
Credit Facility interest rate		1.00%	1.66%

Long Term Debt - Additional information (Detail) - USD ($)	1 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	12 Months Ended
	Jan. 31, 2012	Mar. 31, 2013	Jun. 30, 2013	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Debt Instrument
Credit facility commitment					$ 10,000,000
Line of credit facility, interest rate description					The base rate is defined as the highest of (i) JPMorgan Chase Bank N.A.'s prime lending rate, (ii) the federal funds rate plus 0.5% or (iii) one-month LIBOR plus 1%.
Line of credit facility, interest rate above federal fund rate					0.50%
Line of credit facility, interest above one month LIBOR rate					1.00%
Outstanding borrowing under credit facility					$ 2,507,000
Required offer price to repurchase senior notes if change of control repurchase event and downgrade below investment grade credit rating occurs					101.00%
Outstanding letters of credit					$ 15,288,000
Additional interest expense					$ 1,034,000	$ 963,000	$ 898,000
After Amendment
Debt Instrument
Debt covenant		3.75	3.75		3.75
Before Amendment
Debt Instrument
Debt covenant				3.50
Including Acquisition Bridge Debt
Debt Instrument
Debt covenant					3.50x
Excluding Acquisition Bridge Debt
Debt Instrument
Debt covenant					3.75x
Unrestricted Cash Reduction \| Minimum
Debt Instrument
Reduction of consolidated debt in the debt ratio calculation					$ 50,000,000
Unrestricted Cash Reduction \| Maximum
Debt Instrument
Maximum consolidated debt reduction for unrestricted cash and cash equivalents for debt covenant calculation					200,000,000
Term Loan Facility
Debt Instrument
Credit facility commitment					250,000,000
Annual principal payment of debt					$ 5,000,000
Debt instrument maturity period					March 31, 2015
Revolving Facility
Debt Instrument
Credit facility commitment					$ 350,000,000
Senior unsecured revolving facility, maturity period					4 years
Debt instrument maturity period					March 31, 2015
Outstanding letters of credit					$ 2,507,000	$ 1,963,000
AR Credit Facility
Debt Instrument
Line of credit facility, interest above one month LIBOR rate					0.75%
Debt instrument maturity period					April 20, 2013
Additional borrowings under AR credit facility					$ 100,000,000
Outstanding borrowing under credit facility					$ 100,000,000
6.25% Senior Notes, Due 2037
Debt Instrument
Debt instrument maturity period					May 1, 2037
Senior notes debt outstanding repurchased after year end	$ 20,000,000
Percent of par value paid to repurchase senior notes	$ 90.75
Debt instrument maturity date	2037				2037
Interest rate on notes	6.25%				6.25%
6.6% Senior Notes, Due 2018
Debt Instrument
Debt instrument maturity period					April 15, 2018
Debt instrument maturity date					2018
Interest rate on notes					6.60%
Increase in annual interest expense due to ongoing amortization of the terminated value of the swap agreements					$ 1,000,000

Senior Unsecured Credit Facilities (Detail) $ in Thousands	12 Months Ended
Senior Unsecured Credit Facilities (Detail) $ in Thousands	Dec. 31, 2012 USD ($)
Debt Instrument
Revolving Facility Commitment	$ 350,000
Term Loan Facility Commitment	250,000
J P Morgan Chase Bank
Debt Instrument
Revolving Facility Commitment	46,667
Term Loan Facility Commitment	33,333
Wells Fargo Bank
Debt Instrument
Revolving Facility Commitment	46,667
Term Loan Facility Commitment	33,333
Sun Trust Bank
Debt Instrument
Revolving Facility Commitment	46,667
Term Loan Facility Commitment	33,333
Branch Banking And Trust Company
Debt Instrument
Revolving Facility Commitment	46,667
Term Loan Facility Commitment	33,333
Bank of America
Debt Instrument
Revolving Facility Commitment	46,667
Term Loan Facility Commitment	33,333
Citibank
Debt Instrument
Revolving Facility Commitment	29,167
Term Loan Facility Commitment	20,833
Deutsche Bank AG New York Branch
Debt Instrument
Revolving Facility Commitment	29,167
Term Loan Facility Commitment	20,833
The Northern Trust Company
Debt Instrument
Revolving Facility Commitment	29,167
Term Loan Facility Commitment	20,833
Comerica Bank
Debt Instrument
Revolving Facility Commitment	14,582
Term Loan Facility Commitment	10,418
Regions Bank
Debt Instrument
Revolving Facility Commitment	14,582
Term Loan Facility Commitment	$ 10,418

Principal Amount Effective Interest Rate and Maturity Date for Debentures and Senior Notes (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($)
6.6% Senior Notes, Due 2018
Debt Instrument
Principal Amount	$ 300,000
Effective Interest Rate	6.81%
Maturity Date	April 15, 2018
7% Debentures, Due 2025
Debt Instrument
Principal Amount	$ 125,000
Effective Interest Rate	7.12%
Maturity Date	December 1, 2025
6.25% Senior Notes, Due 2037
Debt Instrument
Principal Amount	$ 230,000
Effective Interest Rate	6.45%
Maturity Date	May 1, 2037

Long Term Debt Maturities (Detail) - USD ($) $ in Thousands	Dec. 31, 2012	Dec. 31, 2011
Long Term Debt Maturities Repayments Of Principal [Line Items]
2013	$ 5,676
2014	5,229
2015	385,207
2016	145
2017	47
Thereafter	651,555
Total	$ 1,047,859	$ 1,060,084

Financial Instruments - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Maturities of cash equivalents, in months	Three
Long-term debt, carrying values	$ 1,047,859,000	$ 1,060,084,000
Long-term debt, fair values	$ 1,105,650,000	$ 1,087,726,000

Components of Income tax Expense benefit from Continuing Operations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Components Of Income Tax Expense Benefit [Line Items]
Current	$ (2,926)	$ 15,968	$ 10,534
Deferred	12,581	4,080	14,779
Total federal income taxes	9,655	20,048	25,313
Current	373	2,827	1,988
Deferred	1,670	(882)	3,429
Total state income taxes	2,043	1,945	5,417
Current	4,062	(1,006)	(260)
Deferred	1,190		443
Total foreign income taxes	5,252	(1,006)	183
Total taxes on income	$ 16,950	$ 20,987	$ 30,913

Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Tax Contingency
Reduction In APIC Pool Of Excess Tax Benefits From Stock Based Compensation Transactions		$ 966,000
Income tax benefits attributable to stock-based compensation	$ 777,000		$ 1,291,000
Foreign pretax loss	5,473,000	12,897,000	2,410,000
Deferred tax asset, valuation allowance	5,185,000	8,846,000
Valuation allowance, Reversed	$ 3,644,000
Tax deduction, percentage	9.00%
Increased net earnings		$ 2,035,000	$ 1,696,000
Increased net earnings, per share		$ 0.04	$ 0.04
Deferred tax assets, other comprehensive loss	$ 73,588,000	$ 58,277,000	$ 42,998,000
Operating loss carryforwards, amount	$ 179,029,000	140,738,000
Operating loss carryforwards, expiration dates	2032
Deferred tax assets, carryforwards	$ 8,891,000	10,835,000
Domestic and foreign tax credits, amount	10,124,000	3,761,000
Domestic and foreign tax credits, valuation allowance	1,387,000	556,000
Undistributed net earnings	23,400,000
Unrecognized tax benefits potentially affecting income tax rate if recognized	14,386,000	4,915,000
Change in unrecognized tax benefits	15,380,000	9,288,000	11,011,000	$ 16,722,000
Refunds tax	$ 1,617,000	$ 3,010,000	$ 5,571,000
Refund tax, per share	$ 0.04	$ 0.07	$ 0.12
Interest expense on accrual for uncertain tax positions	$ 119,000	$ 305,000	$ 1,327,000
Noncurrent Liability
Income Tax Contingency
Accrued interest	156,000	220,000
Tax benefit on interest accrued for uncertain tax positions	102,000	144,000
Current Liability
Income Tax Contingency
Accrued interest	179,000	54,000
Tax benefit on interest accrued for uncertain tax positions	0	35,000
Minimum
Income Tax Contingency
Alternative Minimum Tax credits	$ 6,295,000
Domestic and foreign tax credits, expiration dates	2018
Maximum
Income Tax Contingency
Domestic and foreign tax credits, expiration dates	2031
Change in unrecognized tax benefits	$ 9,834,000
Canadian Subsidiary
Income Tax Contingency
Deferred tax asset, valuation allowance		$ 2,680,000

Effective Income Tax Rate on Continuing Operations (Detail)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule Of Effective Tax Rates Line Items
Statutory tax rate	35.00%	35.00%	35.00%
Effect of statutory depletion	(17.80%)	(17.50%)	(12.80%)
State income taxes	1.30%	1.30%	2.70%
Foreign valuation allowance	(3.40%)	2.60%	0.80%
Foreign taxes, other	0.50%	0.80%	(0.20%)
Domestic production deduction	0.10%	(1.60%)	(1.60%)
Advanced pricing agreement	1.00%
Medicare subsidy	(0.10%)	0.20%	1.80%
Other items	(0.10%)	0.10%	(1.90%)
Effective income tax rate	16.50%	20.90%	23.80%

Components of Deferred Tax Assets and Liabilities (Detail) - USD ($)	Dec. 31, 2012	Dec. 31, 2011
Components Of Deferred Tax Assets And Liabilities [Line Items]
Employee benefits	$ 33,258,000	$ 37,903,000
Inventories	54,555,000	60,462,000
Valuation and other reserves	17,752,000	14,882,000
Net operating loss carryforwards	8,891,000	10,835,000
Other items net, Assets	1,511,000
Gross deferred tax assets	115,967,000	124,082,000
Valuation allowance on deferred tax assets	(6,572,000)	(9,402,000)
Total net deferred tax assets	109,395,000	114,680,000
Property, plant and equipment	(260,190,000)	(258,433,000)
Goodwill and other intangibles	(70,669,000)	(54,782,000)
Other items net, Liabilities		(1,132,000)
Total deferred tax liabilities	(330,859,000)	(314,347,000)
Net deferred tax liability	$ (221,464,000)	$ (199,667,000)

Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2012	Dec. 31, 2011
Deferred Tax Assets And Liabilities [Line Items]
Current deferred income tax benefits	$ 77,716	$ 80,674
Noncurrent deferred income taxes	(225,592)	(222,064)
Net deferred income taxes	$ (147,876)	$ (141,390)

- Definition

Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards expected to be realized or consumed within one year or operating cycle, if longer.

+ References + Details

Unrecognized Tax Benefits Excluding Interest Correlative Effects and Indirect Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Reconciliation of Unrecognized Tax Benefits
Unrecognized tax benefits at beginning of year	$ 9,288	$ 11,011	$ 16,722
Gross increases - tax positions in prior years	19,434	1,217	19,619
Gross decreases - tax positions in prior years	(13,876)	(1,510)	(3,258)
Gross increases - tax positions in current year	1,555	6,274	6,462
Gross decreases - tax positions in current year		(4,625)	(5,135)
Settlements with taxing authorities	(1,021)	(3,079)	(12,573)
Lapse of statute of limitations			(10,826)
Unrecognized tax benefits at end of year	$ 15,380	$ 9,288	$ 11,011

Schedule of Components of Net Periodic Benefit Cost (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Pension and Other Postretirement Benefits Disclosure [Line Items]
Service cost	$ 13,084	$ 11,270
Interest cost	23,653	23,178
Pension
Pension and Other Postretirement Benefits Disclosure [Line Items]
Service cost	13,084	11,270	$ 11,056
Interest cost	23,653	23,178	22,588
Expected return on assets	(23,899)	(24,493)	(21,041)
Prior service cost	466	534	583
Actuarial (gain) loss	12,417	6,324	9,986
Transition asset	(1)	(1)	(1)
Settlement charge	779	375	3,455
Net periodic benefit cost	26,499	17,187	26,626
Postretirement Benefit
Pension and Other Postretirement Benefits Disclosure [Line Items]
Service cost	227	350	548
Interest cost	1,234	2,225	2,754
Prior service cost	(3,255)	(1,740)	(1,740)
Actuarial (gain) loss	(283)	(85)	13
Net periodic benefit cost	$ (2,077)	$ 750	$ 1,575

Net Periodic Benefit Cost Recognized in Comprehensive Earnings (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Pension
Pension and Other Postretirement Benefits Disclosure [Line Items]
Actuarial loss (gain)	$ 47,877	$ 65,334	$ (10,915)
Prior service cost	(466)	(534)	(583)
Actuarial gain (loss)	(12,417)	(6,324)	(9,986)
Transition asset	1	1	1
Settlement charge	(779)	(375)	(3,455)
Total	34,216	58,102	(24,938)
Postretirement Benefit
Pension and Other Postretirement Benefits Disclosure [Line Items]
Actuarial loss (gain)	1,993	(3,884)	(4,133)
Prior service credit		(10,397)	(1,722)
Prior service cost	3,255	1,740	1,740
Actuarial gain (loss)	283	85	(13)
Total	$ 5,531	$ (12,456)	$ (4,128)

Net Periodic Benefit Cost Not Yet Recognized (Detail) - USD ($) $ in Thousands	Dec. 31, 2012	Dec. 31, 2011
Pension and Other Postretirement Benefits Disclosure [Line Items]
Prior service cost - Gross	$ 2,089	$ 2,555
Actuarial gain - Gross	191,675	156,994
Transition asset - Gross	(11)	(12)
Total - Gross	193,753	159,537
Prior service cost - Net of tax	1,263	1,545
Actuarial gain - Net of tax	115,868	94,903
Transition asset - Net of tax	(7)	(7)
Total - Net of tax	117,124	96,441
Postretirement Benefit
Pension and Other Postretirement Benefits Disclosure [Line Items]
Prior service cost - Gross	(13,598)	(16,853)
Actuarial gain - Gross	(934)	(3,210)
Total - Gross	(14,532)	(20,063)
Prior service cost - Net of tax	(8,220)	(10,188)
Actuarial gain - Net of tax	(565)	(1,940)
Total - Net of tax	$ (8,785)	$ (12,128)

Retirement Plans Postretirement and Postemployment Benefits - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2012 USD ($) BasisPoint	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)
Pension and Other Postretirement Benefits Disclosure [Line Items]
Prior service cost, recognized in net periodic benefit cost	$ 449,000
Prior service cost, recognized in net periodic benefit cost - deferred tax asset and liability	178,000
Transition assets, recognized in net periodic benefit cost	$ 1,000
Reduction in the discount rate assumption \| BasisPoint	90
Accumulated benefit obligation for defined benefit pension plans	$ 481,865,000	$ 417,771,000
Pension contribution and SERP payments	33,400,000	30,215,000
Corporation's matching obligations	5,956,000	5,370,000	$ 5,074,000
Accrued postemployment benefits	$ 1,538,000	1,691,000
Equity Securities
Pension and Other Postretirement Benefits Disclosure [Line Items]
Percentage of pension asset equity securities in mid and large capitalization funds	63.00%
Debt Securities
Pension and Other Postretirement Benefits Disclosure [Line Items]
Percentage of pension assets invested in debt securities with objective of exceeding return of Barclays Capital Aggregate Bond Index	85.00%
Pension
Pension and Other Postretirement Benefits Disclosure [Line Items]
Actuarial gain (loss), recognized in net periodic benefit cost	$ 15,341,000
Actuarial gain (loss), recognized in net periodic benefit cost - deferred tax asset and liability	6,067,000
SERP Plans
Pension and Other Postretirement Benefits Disclosure [Line Items]
Estimated contribution of pension plans	27,025,000
Postretirement Benefit
Pension and Other Postretirement Benefits Disclosure [Line Items]
Prior service cost, recognized in net periodic benefit cost	3,255,000
Prior service cost, recognized in net periodic benefit cost - deferred tax asset and liability	1,287,000
Pension contribution and SERP payments	3,994,000	$ 3,869,000
Postretirement Health Care Plans
Pension and Other Postretirement Benefits Disclosure [Line Items]
Estimated contribution of pension plans	$ 3,980,000

Change in Projected Benefit Obligation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule of Defined Benefit Plan Change in Benefit Obligation [Line Items]
Net benefit obligation at beginning of year	$ 457,175	$ 398,638
Service cost	13,084	11,270
Interest cost	23,653	23,178
Actuarial loss	61,286	41,971
Gross benefits paid	(19,415)	(17,882)
Net benefit obligation at end of year	535,783	457,175	$ 398,638
Postretirement Benefit
Schedule of Defined Benefit Plan Change in Benefit Obligation [Line Items]
Net benefit obligation at beginning of year	29,635	45,210
Service cost	227	350	548
Interest cost	1,234	2,225	2,754
Participants' contributions	2,528	1,925
Actuarial loss	1,993	(3,884)
Plan amendments		(10,397)
Gross benefits paid	(6,522)	(6,250)
Federal subsidy on benefits paid		456
Net benefit obligation at end of year	$ 29,095	$ 29,635	$ 45,210

Schedule of Change In Plan Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Assets By Fair Value [ Line Items ]
Fair value of plan assets at beginning of year	$ 325,150	$ 311,688
Actual return on plan assets, net	37,308	1,129
Employer contributions	33,400	30,215
Gross benefits paid	(19,415)	(17,882)
Fair value of plan assets at end of year	376,443	325,150
Postretirement Benefit
Defined Benefit Plan Assets By Fair Value [ Line Items ]
Employer contributions	3,994	3,869
Participants' contributions	2,528	1,925
Gross benefits paid	$ (6,522)	(6,250)
Federal subsidy on benefits paid		$ 456

- Definition

The difference between fair value of plan assets at the end of the period and the fair value at the beginning of the period, adjusted for contributions and payments of benefits during the period, and after adjusting for taxes and other expenses, as applicable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Actual Return on Plan Assets (Component of Net Periodic Postretirement Benefit Cost)
-URI http://asc.fasb.org/extlink&oid=6504192

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 1
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Actual Return on Plan Assets (Component of Net Periodic Pension Cost)
-URI http://asc.fasb.org/extlink&oid=6504226

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 264
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Name Statement of Financial Accounting Standard (FAS)
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-Paragraph 5
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Number 106
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

The amount of payments made for which participants are entitled under a pension plan, including pension benefits, death benefits, and benefits due on termination of employment. Also includes payments made under a postretirement benefit plan, including prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. This item represents a periodic decrease to the plan obligations and a decrease to plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6521376

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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 106
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Reference 10: http://www.xbrl.org/2003/role/presentationRef
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

+ References + Details

Schedule of Funded Status (Detail) - USD ($) $ in Thousands	Dec. 31, 2012	Dec. 31, 2011
Retirement Plans [Line Items]
Accrued benefit cost	$ (159,340)	$ (132,025)
Postretirement Benefit
Retirement Plans [Line Items]
Accrued benefit cost	$ (29,095)	$ (29,635)

- Definition

This represents the entire liability recognized in the balance sheet that is associated with the defined benefit plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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-Number 132R
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Schedule of Amounts Recognized on Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands	Dec. 31, 2012	Dec. 31, 2011
Retirement Plans [Line Items]
Current liability	$ (2,871)	$ (2,320)
Noncurrent liability	(156,469)	(129,705)
Net amount recognized at end of year	(159,340)	(132,025)
Postretirement Benefit
Retirement Plans [Line Items]
Current liability	(3,980)	(2,930)
Noncurrent liability	(25,115)	(26,705)
Net amount recognized at end of year	$ (29,095)	$ (29,635)

- Definition

This represents the entire liability recognized in the balance sheet that is associated with the defined benefit plans.

+ References

+ Details

- Definition

This represents the noncurrent liability for underfunded plans recognized in the balance sheet that is associated with the defined benefit pension plans and other postretirement defined benefit plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Schedule of Accumulated Benefit Obligations in Excess of Plan Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2012	Dec. 31, 2011
Retirement Plans [Line Items]
Projected benefit obligation	$ 535,783	$ 457,175
Accumulated benefit obligation	481,865	417,771
Fair value of plan assets	$ 376,443	$ 325,150

Schedule of Weighted Average Assumptions (Detail)	12 Months Ended
Schedule of Weighted Average Assumptions (Detail)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule of Benefit Obligations Weighted Average Assumptions [Line Items]
Discount rate	4.24%	5.14%
Rate of increase in future compensation levels	5.00%	5.00%
Discount rate	5.14%	5.84%	5.90%
Rate of increase in future compensation levels	5.00%	5.00%	5.00%
Expected long-term rate of return on assets	7.25%	7.75%	7.75%
Postretirement Benefit
Schedule of Benefit Obligations Weighted Average Assumptions [Line Items]
Discount rate	3.54%	4.44%
Discount rate	4.44%	5.57%	5.60%

Schedule of Target Assets Allocation (Detail)	12 Months Ended
Schedule of Target Assets Allocation (Detail)	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Total, Target Allocation	100.00%
Total	100.00%	100.00%
Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Other securities, Target Allocation	56.00%
Total	57.00%	57.00%
Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Other securities, Target Allocation	34.00%
Total	33.00%	34.00%
Hedge Funds
Defined Benefit Plan Disclosure [Line Items]
Other securities, Target Allocation	5.00%
Total	5.00%	4.00%
Real Estate
Defined Benefit Plan Disclosure [Line Items]
Other securities, Target Allocation	5.00%
Total	5.00%	5.00%

Schedule of Fair Values of Pension Plan Assets by Asset Class and Fair Value Hierarchy Level (Detail) - USD ($) $ in Thousands	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule of Pension Plan Assets by Fair Value [Line Items]
Fair values of pension plan assets	$ 376,443	$ 325,150	$ 311,688
Real Estate
Schedule of Pension Plan Assets by Fair Value [Line Items]
Fair values of pension plan assets	17,606	15,841
Hedge Funds
Schedule of Pension Plan Assets by Fair Value [Line Items]
Fair values of pension plan assets	19,252	12,979
Cash and Cash Equivalents
Schedule of Pension Plan Assets by Fair Value [Line Items]
Fair values of pension plan assets	381	459
Equity Securities \| Mid Sized To Large Cap
Schedule of Pension Plan Assets by Fair Value [Line Items]
Fair values of pension plan assets	150,742	133,512
Equity Securities \| International And Emerging Growth Funds
Schedule of Pension Plan Assets by Fair Value [Line Items]
Fair values of pension plan assets	63,003	50,518
Debt Securities \| Core Fixed Income
Schedule of Pension Plan Assets by Fair Value [Line Items]
Fair values of pension plan assets	105,972	94,745
Debt Securities \| High Yield Bonds
Schedule of Pension Plan Assets by Fair Value [Line Items]
Fair values of pension plan assets	19,487	17,096
Quoted Prices In Active Markets For Identical Assets (Level 1)
Schedule of Pension Plan Assets by Fair Value [Line Items]
Fair values of pension plan assets	381	459
Quoted Prices In Active Markets For Identical Assets (Level 1) \| Cash and Cash Equivalents
Schedule of Pension Plan Assets by Fair Value [Line Items]
Fair values of pension plan assets	381	459
Significant Observable Inputs (Level 2)
Schedule of Pension Plan Assets by Fair Value [Line Items]
Fair values of pension plan assets	356,810	311,712
Significant Observable Inputs (Level 2) \| Real Estate
Schedule of Pension Plan Assets by Fair Value [Line Items]
Fair values of pension plan assets	17,606	15,841
Significant Observable Inputs (Level 2) \| Equity Securities \| Mid Sized To Large Cap
Schedule of Pension Plan Assets by Fair Value [Line Items]
Fair values of pension plan assets	150,742	133,512
Significant Observable Inputs (Level 2) \| Equity Securities \| International And Emerging Growth Funds
Schedule of Pension Plan Assets by Fair Value [Line Items]
Fair values of pension plan assets	63,003	50,518
Significant Observable Inputs (Level 2) \| Debt Securities \| Core Fixed Income
Schedule of Pension Plan Assets by Fair Value [Line Items]
Fair values of pension plan assets	105,972	94,745
Significant Observable Inputs (Level 2) \| Debt Securities \| High Yield Bonds
Schedule of Pension Plan Assets by Fair Value [Line Items]
Fair values of pension plan assets	19,487	17,096
Significant Unobservable Inputs (Level 3)
Schedule of Pension Plan Assets by Fair Value [Line Items]
Fair values of pension plan assets	19,252	12,979	$ 13,453
Significant Unobservable Inputs (Level 3) \| Hedge Funds
Schedule of Pension Plan Assets by Fair Value [Line Items]
Fair values of pension plan assets	$ 19,252	$ 12,979

Schedule Of Change In Fair Value Of Pension Plan Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of year	$ 325,150	$ 311,688
Fair value of plan assets at end of year	376,443	325,150
Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of year	12,979	13,453
Purchases	5,500
Unrealized gain (loss)	773	(474)
Fair value of plan assets at end of year	$ 19,252	$ 12,979

- Definition

+ References + Details

Schedule Of Expected Benefit Payments (Detail) $ in Thousands	Dec. 31, 2012 USD ($)
Pension
Defined Benefit Plan Disclosure [Line Items]
2013	$ 19,589
2014	21,126
2015	23,028
2016	24,892
2017	26,631
Years 2018 - 2022	156,728
Postretirement Benefit
Defined Benefit Plan Disclosure [Line Items]
2013	3,980
2014	2,820
2015	2,866
2016	2,816
2017	2,718
Years 2018 - 2022	$ 11,604

Schedule of Assumed Health Care Cost Trend Rate (Detail)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Health care cost trend rate assumed for next year	8.00%	7.50%
Rate to which the cost trend rate gradually declines	5.00%	5.00%
Year the rate reaches the ultimate rate	2019	2017

Schedule Of One Percentage-Point Change In Assumed Health Care Cost Trend Rate (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Total service and interest cost components, Increase	$ 59
Total service and interest cost components, Decrease	(51)
Postretirement benefit obligation, Increase	1,525
Postretirement benefit obligation, Decrease	$ (1,299)

Stock-Based Compensation - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2012 USD ($) Age $ / shares shares	Dec. 31, 2011 USD ($) $ / shares shares	Dec. 31, 2010 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock options granted \| shares	71,686
Non-qualified stock options received by nonemployee directors \| shares	3,000
Weighted-average grant-date exercise price of options granted \| $ / shares	$ 69.12	$ 86.90	$ 95.27
Aggregate intrinsic values of options exercised	$ 7,176,000	$ 1,621,000	$ 3,978,000
Aggregate intrinsic values for options outstanding	13,121,000
Aggregate intrinsic values for options exercisable	$ 10,492,000
Common stock price \| $ / shares	$ 94.28
Percentage of incentive compensation to acquire shares, maximum	50.00%
Percentage of discount rate to market value on the incentive compensation	20.00%
Company normal retirement age \| Age	62
Shares available for grant \| shares	510,000
Common stock reserved for future issuance \| shares	250,000
Cumulative shares issued under shareholder value achievement plan \| shares	42,025
Recognized tax benefit related to stock-based compensation expense	$ 3,075,000	$ 4,557,000	$ 5,804,000
Incentive Compensation Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock price \| $ / shares	$ 94.28
Weighted-average grant-date fair value of stock awards, granted \| $ / shares	$ 81.41	$ 84.71	$ 79.78
Aggregate intrinsic values for stock awards	$ 808,000
Aggregate intrinsic values of stock awards, distributed	$ 375,000	$ 165,000	$ 0
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant-date fair value of stock awards, granted \| $ / shares	$ 69.12	$ 86.90	$ 91.33
Aggregate intrinsic values for stock awards	$ 22,495,000
Aggregate intrinsic values of stock awards, distributed	$ 8,695,000	$ 10,237,000	$ 10,031,000
Directors' Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance \| shares	300,000
Minimum percentage of directors retainer required to be paid in common stock	50.00%
Percentage of discount rate to market value on directors fees paid in common stock	20.00%
Common stock issued under the plan \| shares	23,830	19,977	17,804

Summary Information for Stock Options (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options, Outstanding January 1,2012	1,151,567
Number of Options, Granted	71,686
Number of Options, Exercised	(188,631)
Number of Options, Terminated	(6,665)
Number of Options, Outstanding at December 31, 2012	1,027,957	1,151,567
Number of Options, Exercisable at December 31, 2012	854,178
Weighted-Average Exercise Price, Outstanding at January 1, 2012	$ 89.93
Weighted-Average Exercise Price, Granted	69.12	$ 86.90	$ 95.27
Weighted-Average Exercise Price, Exercised	48.06
Weighted-Average Exercise Price, Terminated	100.73
Weighted-Average Exercise Price, Outstanding at December 31, 2012	96.10	$ 89.93
Weighted-Average Exercise Price, Exercisable at December 31, 2012	$ 99.52
Weighted-Average Remaining Contractual Life (years), Outstanding at December 31, 2012	3 years 4 months 24 days
Weighted-Average Remaining Contractual Life (years), Exercisable at December 31, 2012	2 years 9 months 18 days

Summary Information For Incentive Stock Awards And Restricted Stock Awards (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Incentive Compensation Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Awards, January 1, 2012	31,700
Number of Awards, Awarded	12,702
Number of Awards, Distributed	(15,520)
Number of Awards, Forfeited	(1,155)
Number of Awards, December 31, 2012	27,727	31,700
Weighted-Average Grant-Date Fair Value, January 1, 2012	$ 81.04
Weighted-Average Grant-Date Fair Value, Awarded	81.41	$ 84.71	$ 79.78
Weighted-Average Grant-Date Fair Value, Distributed	80.55
Weighted-Average Grant-Date Fair Value, Forfeited	82.49
Weighted-Average Grant-Date Fair Value, December 31, 2012	$ 81.42	$ 81.04
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Awards, January 1, 2012	305,088
Number of Awards, Awarded	58,918
Number of Awards, Distributed	(119,328)
Number of Awards, Forfeited	(6,084)
Number of Awards, December 31, 2012	238,594	305,088
Weighted-Average Grant-Date Fair Value, January 1, 2012	$ 95.72
Weighted-Average Grant-Date Fair Value, Awarded	69.12	$ 86.90	$ 91.33
Weighted-Average Grant-Date Fair Value, Distributed	111.92
Weighted-Average Grant-Date Fair Value, Forfeited	90.06
Weighted-Average Grant-Date Fair Value, December 31, 2012	$ 81.19	$ 95.72

Stock-Based Compensation Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense recognized	$ 7,781	$ 11,522	$ 14,675
Unrecognized compensation cost	5,924
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense recognized	1,835	2,602	3,406
Unrecognized compensation cost	$ 1,473
Weighted-average period over which unrecognized compensation cost to be recognized (In Years)	1 year 10 months 24 days
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense recognized	$ 4,980	7,929	10,368
Unrecognized compensation cost	$ 4,400
Weighted-average period over which unrecognized compensation cost to be recognized (In Years)	2 years 1 month 6 days
Incentive Compensation Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense recognized	$ 237	272	261
Unrecognized compensation cost	$ 51
Weighted-average period over which unrecognized compensation cost to be recognized (In Years)	1 year 6 months
Directors' Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense recognized	$ 729	$ 719	$ 640
Weighted-average period over which unrecognized compensation cost to be recognized (In Years)	0 years

Stock-Based Compensation Expense in Future for Outstanding Awards (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2012 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
2013	$ 3,199
2014	1,975
2015	720
2016	30
Total	$ 5,924

Lease - Additional Information (Detail) - USD ($)	12 Months Ended
Lease - Additional Information (Detail) - USD ($)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operating Leased Assets [Line Items]
Lease expenses for operating lease	$ 44,177,000	$ 46,314,000	$ 47,830,000
Total royalties	43,445,000	$ 36,333,000	$ 37,474,000
Corporate
Operating Leased Assets [Line Items]
Future minimum lease commitments related to contracts of affreightment	$ 107,011,000

Future Minimum Lease and Mineral and Other Royalty Commitments for All Noncancelable Agreements (Detail) $ in Thousands	Dec. 31, 2012 USD ($)
Future Minimum Payments Under Non-Cancelable Operating Leases With Initial Terms Of One-Year Or More [Line Items]
2013	$ 75,298
2014	55,706
2015	51,353
2016	38,828
2017	29,851
Thereafter	109,464
Total	$ 360,500

Shareholders' Equity - Additional Information (Detail)	12 Months Ended
Shareholders' Equity - Additional Information (Detail)	Dec. 31, 2012 $ / shares $ / Right shares	Dec. 31, 2011 $ / shares shares
Class of Stock [Line Items]
Common stock, shares authorized	100,000,000	100,000,000
Common stock, par value \| $ / shares	$ 0.01	$ 0.01
Common stock reserved for issuance under stock-based plans	2,132,000
Common stock remaining under repurchase authorization	5,041,900
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, par value \| $ / shares	$ 0.01	$ 0.01
Percentage ownership by person or group making rights exercisable	15.00%
Rights exercisable price, per share \| $ / Right	315
Rights redemption price, per right \| $ / shares	$ 0.001
Class A Preferred Stock
Class of Stock [Line Items]
Preferred stock reserved for issuance under stock-based plans	100,000
Class B Preferred Stock
Class of Stock [Line Items]
Preferred stock reserved for issuance under stock-based plans	200,000

Commitments And Contingencies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2012 USD ($) $ / shares	Dec. 31, 2011 USD ($) $ / shares	Dec. 31, 2010 USD ($) $ / shares
Commitments and Contingencies [Line Items]
Asset retirement obligation depreciation and accretion	$ 3,743,000	$ 3,892,000	$ 3,689,000
Liability reserve for insurance claims	20,294,000	23,749,000
Increased accrual for casualty claims	(3,600,000)	1,100,000	1,500,000
Decreased net earnings for estimated cost of claims	$ 2,176,000	$ (665,000)	$ (907,000)
Increase decrease per diluted share due to changes in estimated cost of claims for prior policy years \| $ / shares	$ 0.05	$ (0.01)	$ (0.02)
Contingently liability in letters of credit	$ 15,288,000
Credit Facility	2,507,000
Surety bonds	261,730,000
Balance of top 5 surety bonds	$ 72,673,000
Group of bonds, amount	5
Percentage of top 5 surety bonds	28.00%
Purchase commitments for property, plant and equipment	$ 15,839,000
Purchase commitments for energy and service contracts amount	$ 34,545,000
Percentage of employees represented in labor union	14.00%
Revolving Line Of Credit Expires In July 2013
Commitments and Contingencies [Line Items]
Guarantee of affiliate's obligations	$ 24,000,000
Line of credit maturity period	2013-07
Loan Due April 2016
Commitments and Contingencies [Line Items]
Guarantee of affiliate's obligations	$ 6,200,000
Loan due date	2015-04

Changes in Asset Retirement Obligations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of Changes in Asset Retirement Obligations [Line Items]
Balance at January 1	$ 43,233	$ 41,079
Accretion expense	2,712	2,645
Liabilities incurred	204	3,062
Liabilities settled	(126)	(2,091)
Revisions in estimated cash flows	150	(1,462)
Balance at December 31	$ 46,173	$ 43,233

Contractual Purchase Commitments (Detail) $ in Thousands	Dec. 31, 2012 USD ($)
Commitments and Contingencies [Line Items]
2013	$ 41,496
2014	8,659
2015	229
Total	$ 50,384

Business Segments - Additional Information (Detail)	12 Months Ended
Business Segments - Additional Information (Detail)	Dec. 31, 2012 USD ($) Segment	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)
Segment Reporting Information [Line Items]
Reportable business segments \| Segment	3
West Group
Segment Reporting Information [Line Items]
Land acquired through noncash transactions	$ 690,000	$ 144,961,000
Mideast Group
Segment Reporting Information [Line Items]
Land acquired through noncash transactions			$ 1,900,000
Southeast Group
Segment Reporting Information [Line Items]
Land acquired through noncash transactions			$ 450,000

Financial Data for Continuing Operations for the Corporations Reportable Business Segments (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Segment Reporting Information [Line Items]
Total revenues	$ 2,037,667	$ 1,713,745	$ 1,652,806
Net Sales	1,838,723	1,519,883	1,475,638
Gross profit, Total	325,916	301,972	321,651
Selling, general and administrative expenses, Total	138,398	124,138	130,422
Earnings (Loss) from operations, Total	154,953	160,979	198,307
Assets employed, Total	3,160,926	3,147,822	3,074,743
Depreciation, depletion and amortization, Total	177,211	173,407	181,537
Total property additions	151,713	340,553	172,080
Property additions through acquisitions total		40,229	33,814
Total Aggregates Business
Segment Reporting Information [Line Items]
Total revenues	1,816,954	1,494,622	1,459,626
Net Sales	1,636,506	1,319,308	1,299,292
Gross profit, Total	254,134	229,962	264,260
Selling, general and administrative expenses, Total	116,424	108,514	107,484
Earnings (Loss) from operations, Total	143,533	127,431	168,515
Assets employed, Total	2,791,350	2,806,072	2,698,228
Depreciation, depletion and amortization, Total	161,467	157,177	163,851
Total property additions	108,953	312,230	163,826
Property additions through acquisitions total		40,229	33,814
Specialty Products
Segment Reporting Information [Line Items]
Total revenues	220,713	219,123	193,180
Net Sales	202,217	200,575	176,346
Gross profit, Total	77,223	75,405	61,685
Selling, general and administrative expenses, Total	9,295	9,197	11,046
Earnings (Loss) from operations, Total	68,542	66,305	50,578
Assets employed, Total	157,673	120,305	102,103
Depreciation, depletion and amortization, Total	7,838	7,075	8,385
Total property additions	38,873	21,983	6,431
Mideast Group
Segment Reporting Information [Line Items]
Total revenues	445,097	430,638	420,618
Net Sales	406,651	395,470	390,581
Gross profit, Total	108,876	104,204	109,865
Selling, general and administrative expenses, Total	36,928	37,762	36,914
Earnings (Loss) from operations, Total	75,028	69,723	75,261
Assets employed, Total	724,945	753,005	758,735
Depreciation, depletion and amortization, Total	44,189	46,668	50,524
Total property additions	32,179	39,504	50,869
Property additions through acquisitions total			12,912
Southeast Group
Segment Reporting Information [Line Items]
Total revenues	304,524	306,436	336,351
Net Sales	282,161	283,287	303,174
Gross profit, Total	10,755	21,009	46,062
Selling, general and administrative expenses, Total	22,832	26,873	27,709
Earnings (Loss) from operations, Total	(13,470)	(5,884)	17,924
Assets employed, Total	652,567	663,321	836,695
Depreciation, depletion and amortization, Total	39,007	51,090	56,622
Total property additions	29,541	29,531	54,138
Property additions through acquisitions total			20,902
West Group
Segment Reporting Information [Line Items]
Total revenues	1,067,333	757,548	702,657
Net Sales	947,694	640,551	605,537
Gross profit, Total	134,503	104,749	108,333
Selling, general and administrative expenses, Total	56,664	43,879	42,861
Earnings (Loss) from operations, Total	81,975	63,592	75,330
Assets employed, Total	1,413,838	1,389,746	1,102,798
Depreciation, depletion and amortization, Total	78,271	59,419	56,705
Total property additions	47,233	243,195	58,819
Property additions through acquisitions total		40,229
Corporate
Segment Reporting Information [Line Items]
Gross profit, Total	(5,441)	(3,395)	(4,294)
Selling, general and administrative expenses, Total	12,679	6,427	11,892
Earnings (Loss) from operations, Total	(57,122)	(32,757)	(20,786)
Assets employed, Total	211,903	221,445	274,412
Depreciation, depletion and amortization, Total	7,906	9,155	9,301
Total property additions	$ 3,887	$ 6,340	$ 1,823

Net Sales By Product Line (Detail) - USD ($) $ in Thousands	12 Months Ended
Net Sales By Product Line (Detail) - USD ($) $ in Thousands	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Business Combination, Separately Recognized Transactions
Total revenues	$ 2,037,667	$ 1,713,745	$ 1,652,806
Net Sales	1,838,723	1,519,883	1,475,638
Gross Profit	325,916	301,972	321,651
Aggregates
Business Combination, Separately Recognized Transactions
Total revenues	1,470,953	1,372,243	1,365,729
Net Sales	1,303,975	1,213,635	1,218,569
Gross Profit	240,614	223,275	254,290
Asphalt
Business Combination, Separately Recognized Transactions
Total revenues	93,288	63,942	51,055
Net Sales	79,816	47,315	37,917
Gross Profit	12,099	5,836	8,988
Ready Mixed Concrete
Business Combination, Separately Recognized Transactions
Total revenues	116,328	33,075	25,067
Net Sales	116,320	32,990	25,031
Gross Profit	(1,159)	(250)	(508)
Road Paving
Business Combination, Separately Recognized Transactions
Total revenues	136,385	25,362	17,775
Net Sales	136,395	25,368	17,775
Gross Profit	2,580	1,101	1,490
Total Aggregates Business
Business Combination, Separately Recognized Transactions
Total revenues	1,816,954	1,494,622	1,459,626
Net Sales	1,636,506	1,319,308	1,299,292
Gross Profit	254,134	229,962	264,260
Magnesia Based Chemicals
Business Combination, Separately Recognized Transactions
Total revenues	158,752	158,255	132,891
Net Sales	142,922	142,620	120,475
Gross Profit	54,508	50,726	39,821
Dolomitic Lime
Business Combination, Separately Recognized Transactions
Total revenues	60,280	59,496	58,630
Net Sales	57,614	56,582	54,212
Gross Profit	22,316	24,548	24,041
Others
Business Combination, Separately Recognized Transactions
Total revenues	1,681	1,372	1,659
Net Sales	1,681	1,373	1,659
Gross Profit	399	131	(2,177)
Specialty Products
Business Combination, Separately Recognized Transactions
Total revenues	220,713	219,123	193,180
Net Sales	202,217	200,575	176,346
Gross Profit	77,223	75,405	61,685
Corporate
Business Combination, Separately Recognized Transactions
Gross Profit	$ (5,441)	$ (3,395)	$ (4,294)

Domestic and Foreign Total Revenues (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Domestic And Foreign Total Revenues [Line Items]
Total revenues	$ 2,037,667	$ 1,713,745	$ 1,652,806
Domestic
Domestic And Foreign Total Revenues [Line Items]
Total revenues	1,996,142	1,671,999	1,618,715
Foreign
Domestic And Foreign Total Revenues [Line Items]
Total revenues	$ 41,525	$ 41,746	$ 34,091

Components of Change in Other Assets and Liabilities Net (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule of Cash Flow, Supplemental
Other current and noncurrent assets	$ (2,354)	$ 2,439	$ 3,245
Accrued salaries, benefits and payroll taxes	7	(4,722)	(1,415)
Accrued insurance and other taxes	2,274	2,873	(739)
Accrued income taxes	(13,343)	6,139	10,890
Accrued pension, postretirement and postemployment benefits	(13,904)	(16,378)	(22,257)
Other current and noncurrent liabilities	3,836	(3,092)	(3,491)
Change in other assets and liabilities	$ (23,484)	$ (12,741)	$ (13,767)

Supplemental Cash Flow Information (Detail)	12 Months Ended
Supplemental Cash Flow Information (Detail)	Dec. 31, 2012 USD ($)
Schedule of Cash Flow, Supplemental
Increase in prepaid income taxes	$ 12,500,000

Noncash Investing and Financing Activities (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash Flow Supplemental Disclosures [Line Items]
Acquisition of assets through asset exchange	$ 690	$ 150,000
Acquisition of land through property exchange			$ 1,900
Issuance of notes payable for acquisition of land			$ 450

Other Expenses - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Components of Other Income (Expense) [Line Items]
Business development costs	$ 35,140,000	$ 18,575,000	$ 1,220,000
Business development expense, net of tax	$ 21,242,000	$ 11,409,000
Business development expense, per diluted share	$ 0.46	$ 0.25
Retirement and severance expenses	$ 3,885,000	$ 4,414,000
Increase decrease in net earnings per diluted share due to retirement expenses	$ 0.05	$ 0.06
Payments for Legal Settlements			7,000,000
Litigation settlement increase (decrease) in net earnings			$ 2,751,000
Litigation settlement increase (decrease) in net earnings, per diluted share			$ 0.06

- Definition

The charge against earnings in the period for known and estimated costs of termination benefits provided to current employees that are involuntarily terminated under a benefit arrangement associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding costs or losses pertaining to an entity newly acquired in a business combination or a discontinued operation as defined by generally accepted accounting principles and costs associated with one-time termination benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB TOPIC 5.P.4(b))
-URI http://asc.fasb.org/extlink&oid=6394695&loc=d3e140904-122747

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)(10)
-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 5.P.3)
-URI http://asc.fasb.org/extlink&oid=6394695&loc=d3e140864-122747

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5-8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 5
-Section P
-Subsection 3, 4

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 146
-Paragraph 8-13, 20
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS146-1
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 112
-Paragraph 7
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Schedule II - Valuation and Qualifying Accounts (Detail) - USD ($)
$ in Thousands

12 Months Ended

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Allowance for doubtful accounts

Valuation and Qualifying Accounts Disclosure [Line Items]

Balance at beginning of period

$ 5,295

$ 3,578

$ 4,622

Charged to costs and expenses

774

1,717

Deduction-describe

^[1]

1,044

Balance at end of period

6,069

5,295

3,578

Allowance for uncollectible notes receivable

Valuation and Qualifying Accounts Disclosure [Line Items]

Balance at beginning of period

295

179

151

Charged to costs and expenses

145

116

Balance at end of period

440

295

179

Inventory valuation allowance

Valuation and Qualifying Accounts Disclosure [Line Items]

Balance at beginning of period

92,481

87,044

82,674

Charged to costs and expenses

4,475

7,882

4,370

Charged to other accounts-describe

^[2]

2,154

Deduction-describe

^[3]

139

4,599

Balance at end of period

96,817

92,481

87,044

Accumulated amortization of intangible assets

Valuation and Qualifying Accounts Disclosure [Line Items]

Balance at beginning of period

12,824

14,322

13,155

Charged to costs and expenses

3,593

1,453

Deduction-describe

^[4]

425

286

Balance at end of period

15,992

12,824

14,322

Accumulated amortization of intangible assets | Maximum

Valuation and Qualifying Accounts Disclosure [Line Items]

Balance at beginning of period

$ 12,824

14,322

Charged to costs and expenses

1,812

Deduction-describe

^[3]

2,326

Balance at end of period

12,824

$ 14,322

Accumulated amortization of intangible assets | Minimum

Valuation and Qualifying Accounts Disclosure [Line Items]

Deduction-describe

^[4]

$ 984

[1]	To adjust allowance for change in estimates.
[2]	Acquisitions.
[3]	Divestitures.
[4]	Write off of fully amortized intangible assets.

Label	Element	Value
Defined Benefit Plan Funded Status Of Plan	us-gaap_DefinedBenefitPlanFundedStatusOfPlan	$ (132,025,000)
Defined Benefit Plan Funded Status Of Plan	us-gaap_DefinedBenefitPlanFundedStatusOfPlan	(159,340,000)
Other Postretirement Benefit Plans Defined Benefit [Member]
Defined Benefit Plan Funded Status Of Plan	us-gaap_DefinedBenefitPlanFundedStatusOfPlan	(29,635,000)
Defined Benefit Plan Funded Status Of Plan	us-gaap_DefinedBenefitPlanFundedStatusOfPlan	$ (29,095,000)