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Document And Entity Information - shares	9 Months Ended
Document And Entity Information - shares	Sep. 30, 2011	Oct. 21, 2011
Document And Entity Information
Document Type	10-Q
Document Period End Date	Sep. 30, 2011
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Registrant Name	MARTIN MARIETTA MATERIALS INC
Entity Central Index Key	0000916076
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		45,696,740

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2010
Current Assets:
Cash and cash equivalents	$ 56,840	$ 70,323	$ 60,499
Accounts receivable, net	259,773	183,361	249,613
Inventories, net	337,730	331,894	323,820
Current deferred income tax benefits	92,959	83,380	71,593
Other current assets	20,114	27,253	26,591
Total Current Assets	767,416	696,211	732,116
Property, plant and equipment	3,662,446	3,568,275	3,541,058
Allowances for depreciation, depletion and amortization	(1,975,805)	(1,880,445)	(1,847,852)
Net property, plant and equipment	1,686,641	1,687,830	1,693,206
Goodwill	639,039	626,527	624,224
Other intangibles, net	18,211	17,548	17,563
Other noncurrent assets	47,251	46,627	48,674
Total Assets	3,158,558	3,074,743	3,115,783
Current Liabilities:
Bank overdraft		2,123
Accounts payable	86,322	60,333	76,993
Accrued salaries, benefits and payroll taxes	16,867	17,506	14,403
Pension and postretirement benefits	4,420	6,034	16,894
Accrued insurance and other taxes	31,902	23,535	32,409
Income taxes	16,256	174
Current maturities of long-term debt and short-term facilities	7,150	248,714	245,423
Accrued interest	18,709	12,045	27,231
Other current liabilities	16,120	15,029	13,482
Total Current Liabilities	197,746	385,493	426,835
Long-term debt	1,038,335	782,045	785,706
Pension, postretirement and postemployment benefits	102,787	127,671	144,574
Noncurrent deferred income taxes	249,572	228,698	216,844
Other noncurrent liabilities	84,567	82,577	84,596
Total Liabilities	1,673,007	1,606,484	1,658,555
Equity:
Common stock, par value $0.01 per share	456	455	454
Preferred stock, par value $0.01 per share
Additional paid-in capital	400,855	396,485	395,853
Accumulated other comprehensive loss	(49,560)	(53,660)	(67,249)
Retained earnings	1,094,469	1,082,160	1,085,750
Total Shareholders' Equity	1,446,220	1,425,440	1,414,808
Noncontrolling interests	39,331	42,819	42,420
Total Equity	1,485,551	1,468,259	1,457,228
Total Liabilities and Equity	$ 3,158,558	$ 3,074,743	$ 3,115,783

Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2010
Equity:
Common stock, par value	$ 0.01	$ 0.01	$ 0.01
Preferred stock, par value	$ 0.01	$ 0.01	$ 0.01

Consolidated Statements Of Earnings - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Consolidated Statements Of Earnings
Net Sales	$ 463,985	$ 443,709	$ 1,196,931	$ 1,182,054
Freight and delivery revenues	70,771	65,692	187,284	172,920
Total revenues	534,756	509,401	1,384,215	1,354,974
Cost of sales	352,520	329,900	967,873	930,906
Freight and delivery costs	70,771	65,692	187,284	172,920
Total cost of revenues	423,291	395,592	1,155,157	1,103,826
Gross Profit	111,465	113,809	229,058	251,148
Selling, general & administrative expenses	33,487	31,235	94,386	98,365
Research and development		114	2	149
Other operating (income) and expenses, net	(1,021)	(1,394)	(1,213)	(9,030)
Earnings from Operations	78,999	83,854	135,883	161,664
Interest expense	13,394	17,104	45,284	51,540
Other nonoperating (income) and expenses, net	2,146	(545)	2,220	189
Earnings from continuing operations before taxes on income	63,459	67,295	88,379	109,935
Income tax expense	13,374	14,061	20,080	26,615
Earnings from Continuing Operations	50,085	53,234	68,299	83,320
Gain on discontinued operations, net of related tax expense (benefit) of $138, ($37), $121 and $12, respectively	247	22	191	135
Consolidated net earnings	50,332	53,256	68,490	83,455
Less: Net earnings attributable to noncontrolling interests	1,176	1,266	949	1,246
Net Earnings Attributable to Martin Marietta Materials, Inc.	49,156	51,990	67,541	82,209
Net Earnings Attributable to Martin Marietta Materials, Inc.
Earnings from continuing operations	48,909	51,968	67,350	82,074
Earnings from discontinued operations	247	22	191	135
Net Earnings Attributable to Martin Marietta Materials, Inc.	$ 49,156	$ 51,990	$ 67,541	$ 82,209
Net Earnings Attributable to Martin Marietta Materials, Inc. Per Common Share
Basic from continuing operations attributable to common shareholders	$ 1.07	$ 1.13	$ 1.47	$ 1.79
Discontinued operations attributable to common shareholders
Basic net earnings available to common shareholders	1.07	1.13	1.47	1.79
Diluted from continuing operations attributable to common shareholders	1.07	1.13	1.46	1.78
Discontinued operations attributable to common shareholders
Diluted net earnings available to common shareholders	$ 1.07	$ 1.13	$ 1.46	$ 1.78
Weighted-Average Common Shares Outstanding
Basic	45,690	45,526	45,634	45,463
Diluted	45,799	45,678	45,783	45,639
Cash Dividends Per Common Share	$ 0.40	$ 0.40	$ 1.20	$ 1.20

Consolidated Statements Of Earnings (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Consolidated Statements Of Earnings
Gain on discontinued operations, related tax expense (benefit)	$ 138	$ (37)	$ 121	$ 12

- 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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 144
-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 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 144
-Paragraph 47
-Subparagraph c
-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 109
-Paragraph 46
-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 Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32672-109319

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b),(c)
-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 20
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6909487&loc=d3e38679-109324

+ Details

Consolidated Statements Of Cash Flows - USD ($)	9 Months Ended
Consolidated Statements Of Cash Flows - USD ($)	Sep. 30, 2011	Sep. 30, 2010
Cash Flows from Operating Activities:
Consolidated net earnings	$ 68,490,000	$ 83,455,000
Adjustments to reconcile consolidated net earnings to net cash provided by operating activities:
Depreciation, depletion and amortization	129,673,000	135,946,000
Stock-based compensation expense	9,317,000	11,684,000
Gains on divestitures and sales of assets	(3,890,000)	(4,293,000)
Deferred income taxes	6,358,000	17,131,000
Excess tax benefits from stock-based compensation transactions		(1,643,000)
Other items, net	1,370,000	704,000
Changes in operating assets and liabilities, net of effects of acquisitions and divestitures:
Accounts receivable, net	(77,971,000)	(86,798,000)
Inventories, net	(4,431,000)	8,888,000
Accounts payable	25,975,000	24,898,000
Other assets and liabilities, net	24,979,000	12,639,000
Net Cash Provided by Operating Activities	179,870,000	202,611,000
Cash Flows from Investing Activities:
Additions to property, plant and equipment	(93,518,000)	(110,024,000)
Acquisitions, net	(49,930,000)	(28,107,000)
Proceeds from divestitures and sales of assets	6,178,000	4,524,000
Railcar construction advances		(8,997,000)
Repayments of railcar construction advances		8,997,000
Net Cash Used for Investing Activities	(137,270,000)	(133,607,000)
Cash Flows from Financing Activities:
Borrowings of long-term debt	460,000,000	150,000,000
Repayments of long-term debt	(445,471,000)	(369,229,000)
Debt issuance costs	(3,328,000)	(80,000)
Change in bank overdraft	(2,123,000)	(1,737,000)
Payments on capital lease obligations		(308,000)
Dividends paid	(55,232,000)	(55,157,000)
Distributions to owners of noncontrolling interests	(1,000,000)
Purchase of remaining interest in existing limited liability company	(10,394,000)
Issuances of common stock	1,465,000	2,772,000
Excess tax benefits from stock-based compensation transactions		1,643,000
Net Cash Used for Financing Activities	(56,083,000)	(272,096,000)
Net Decrease in Cash and Cash Equivalents	(13,483,000)	(203,092,000)
Cash and Cash Equivalents, beginning of period	70,323,000	263,591,000
Cash and Cash Equivalents, end of period	56,840,000	60,499,000
Noncash Investing and Financing Activities:
Issuance of notes payable for acquisition of land		450,000
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	36,649,000	36,073,000
Cash (refunds) payments for income taxes	$ (7,831,000)	$ 3,732,000

Consolidated Statement Of Total Equity - 9 months ended Sep. 30, 2011 - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings [Member]	Total Shareholders' Equity [Member]	Noncontrolling Interests [Member]	Total
Beginning Balance at Dec. 31, 2010	$ 455	$ 396,485	$ (53,660)	$ 1,082,160	$ 1,425,440	$ 42,819	$ 1,468,259
Beginning Balance, Shares at Dec. 31, 2010	45,579
Consolidated net earnings				67,541	67,541	949	68,490
Adjustment for funded status of pension and postretirement benefit plans, net of tax of $6,663			4,130		4,130	2	4,132
Foreign currency translation loss			(462)		(462)		(462)
Amortization of terminated value of forward starting interest rate swap agreements into interest expense, net of tax of $283			432		432		432
Consolidated comprehensive earnings					71,641	951	72,592
Dividends declared				(55,232)	(55,232)		(55,232)
Issuances of common stock for stock award plans	$ 1	(1,210)			(1,209)		(1,209)
Issuances of common stock for stock award plans, shares	118
Stock-based compensation expense		9,317			9,317		9,317
Distributions to owners of noncontrolling interests						(1,000)	(1,000)
Purchase of remaining interest in existing limited liability company		(3,737)			(3,737)	(3,439)	(7,176)
Ending Balance at Sep. 30, 2011	$ 456	$ 400,855	$ (49,560)	$ 1,094,469	$ 1,446,220	$ 39,331	$ 1,485,551
Ending Balance, Shares at Sep. 30, 2011	45,697

Consolidated Statement Of Total Equity (Parenthetical) $ in Thousands	9 Months Ended
	Sep. 30, 2011 USD ($)
Tax benefit on adjustment for funded status of pension and postretirement benefit plans	$ 6,663
Tax benefit on amortization of terminated value of forward starting interest rate swap agreements into interest expense	283
Total Shareholders' Equity [Member]
Tax benefit on adjustment for funded status of pension and postretirement benefit plans	6,663
Tax benefit on amortization of terminated value of forward starting interest rate swap agreements into interest expense	283
Accumulated Other Comprehensive Loss [Member]
Tax benefit on adjustment for funded status of pension and postretirement benefit plans	6,663
Tax benefit on amortization of terminated value of forward starting interest rate swap agreements into interest expense	$ 283

Significant Accounting Policies

9 Months Ended

Sep. 30, 2011

Significant Accounting Policies

Significant Accounting Policies

1.	Significant Accounting Policies

Basis of Presentation

The accompanying unaudited consolidated financial statements of Martin Marietta Materials, Inc. (the "Corporation") have been prepared in accordance with generally accepted accounting principles for interim financial information and with the instructions to the Quarterly Report on Form 10-Q and to Article 10 of Regulation S-X. The Corporation has continued to follow the accounting policies set forth in the audited consolidated financial statements and related notes thereto included in the Corporation's Annual Report on Form 10-K for the year ended December 31, 2010, filed with the Securities and Exchange Commission on February 25, 2011. In the opinion of management, the interim financial information provided herein reflects all adjustments, consisting of normal recurring accruals, necessary for a fair presentation of the results of operations, financial position and cash flows for the interim periods. The results of operations for the quarter and nine months ended September 30, 2011 are not indicative of the results expected for other interim periods or the full year. The balance sheet at December 31, 2010 has been derived from the audited financial statements at that date but does not include all of the information and notes required by generally accepted accounting principles for complete financial statements. These financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Corporation's Annual Report on Form 10-K for the year ended December 31, 2010.

Earnings per Common Share

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:


	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
	(In Thousands)
Net earnings from continuing operations attributable to Martin Marietta Materials, Inc.	$	48,909	$	51,968	$	67,350	$	82,074
Less: Distributed and undistributed earnings attributable to unvested awards		378		529		557		865

Basic and diluted net earnings available to common shareholders from continuing operations attributable to Martin Marietta Materials, Inc.		48,531		51,439		66,793		81,209
Basic and diluted net earnings available to common shareholders from discontinued operations		247		22		191		135

Basic and diluted net earnings available to common shareholders attributable to Martin Marietta Materials, Inc.	$	48,778	$	51,461	$	66,984	$	81,344


Basic weighted-average common shares outstanding		45,690		45,526		45,634		45,463

Effect of dilutive employee and director awards		109		152		149		176

Diluted weighted-average common shares outstanding		45,799		45,678		45,783		45,639

Comprehensive Earnings/Loss

Consolidated comprehensive earnings/loss for the Corporation consists of consolidated net earnings or loss; 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. Consolidated comprehensive earnings for the three and nine months ended September 30, 2011 was $50,091,000 and $72,592,000, respectively. Consolidated comprehensive earnings for the three and nine months ended September 30, 2010 was $55,495,000 and $91,293,000, respectively.

Business Combinations And Discontinued Operations

9 Months Ended

Sep. 30, 2011

Business Combinations And Discontinued Operations

Business Combinations and Discontinued Operations

2.	Business Combinations and Discontinued Operations

Business Combinations

In May 2011, the Corporation purchased the remaining 1% interest in an existing limited liability company for $10,394,000. The purchase of the remaining interest represents an equity transaction. Accordingly, the assets and liabilities related to the noncontrolling interest continued to be valued at their basis at the transaction date; the noncontrolling interest of $3,439,000 was eliminated; additional paid-in capital was reduced by $3,737,000 for the excess of the cash paid, including transaction costs, over the noncontrolling interest at the acquisition date; and a deferred tax asset of $3,218,000 was recorded. The purchase price and the payment of transaction costs have been classified as a financing activity in the Corporation's consolidated statement of cash flows for the nine months ended September 30, 2011.

In June 2011, the Corporation acquired the construction assets of six aggregates quarries, two ready mixed concrete plants and an asphalt plant, all of which are located in western San Antonio, Texas. The operating results of the acquired locations are reported through the Corporation's West Group in the financial statements starting from the date of acquisition. This transaction provides over 200 million tons of high-quality limestone reserves and complements the Corporation's existing integrated presence in this high-growth market.

On October 12, 2011, the Corporation announced that it signed a definitive agreement with Lafarge North America Inc. ("Lafarge") for the exchange of certain assets. Under the terms of the agreement, the Corporation will receive aggregates quarry sites, ready mixed concrete and asphalt plants, and a road paving business in the metropolitan Denver, Colorado, region. In exchange, Lafarge will receive properties consisting of quarries, an asphalt plant and distribution yards operated by the Corporation along the Mississippi River and a cash payment. The transaction is anticipated to close within 60 days, subject to regulatory approval.

Divestitures and Permanent Closures

Operations that are disposed of or permanently shut down 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. All discontinued operations relate to the Aggregates business.

Discontinued operations included the following net sales, pretax gain or loss on operations, income tax benefit or expense and overall net earnings:


	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
	(Dollars in Thousands)

Net sales	$	27	$	44	$	94	$	102


Pretax gain (loss) on operations	$	385	$	(15)	$	312	$	147
Income tax expense (benefit)		138		(37)		121		12

Net earnings	$	247	$	22	$	191	$	135

Inventories, Net

9 Months Ended

Sep. 30, 2011

Inventories, Net

Inventories, Net

3.	Inventories, Net


	September 30, 2011		December 31, 2010		September 30, 2010
	(Dollars in Thousands)

Finished products	$	362,924	$	358,138	$	350,842
Products in process and raw materials		9,483		13,842		14,310
Supplies and expendable parts		53,624		46,958		46,566

		426,031		418,938		411,718
Less allowances		(88,301)		(87,044)		(87,898)

Total	$	337,730	$	331,894	$	323,820

Goodwill And Intangible Assets

9 Months Ended

Sep. 30, 2011

Goodwill And Intangible Assets

Goodwill And Intangible Assets

4.	Goodwill and Intangible Assets

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


	Nine Months Ended September 30, 2011
	Mideast Group		Southeast Group		West Group		Total

Balance at beginning of period	$	122,052	$	105,870	$	398,605	$	626,527
Acquisitions		—		—		12,512		12,512

Balance at end of period	$	122,052	$	105,870	$	411,117	$	639,039

- 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

Long-Term Debt

9 Months Ended

Sep. 30, 2011

Long-Term Debt

Long-Term Debt

5.	Long-Term Debt


	September 30, 2011		December 31, 2010		September 30, 2010
	(Dollars in Thousands)

6.6% Senior Notes, due 2018	$	298,428	$	298,288	$	298,242
7% Debentures, due 2025		124,411		124,393		124,388
6.25% Senior Notes, due 2037		247,906		247,882		247,874
6.875% Notes, due 2011		—		242,129		242,118
Term Loan Facility, due 2015, interest rate of 1.99% at September 30, 2011		250,000		—		—
Term Loan, due 2012, interest rate of 3.29% at December 31, 2010		—		111,750		111,750
Revolving Facility, interest rate of 1.61% at September 30, 2011		20,000		—		—
AR Credit Facility, interest rate of 1.60% at September 30, 2011		100,000		—		—
Other notes		4,740		6,317		6,757

Total debt		1,045,485		1,030,759		1,031,129
Less current maturities		(7,150)		(248,714)		(245,423)

Long-term debt	$	1,038,335	$	782,045	$	785,706

On March 31, 2011, the Corporation entered into 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"), which provides for 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:


Lender	Revolving Facility Commitment		Term Loan Facility Commitment
	(Dollars in Thousands)

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% and (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.

On March 31, 2011, the Corporation borrowed $250,000,000 under the Term Loan Facility, a portion of which was used to prepay the $111,750,000 Term Loan due 2012. The Corporation is required to make annual principal payments of $5,000,000, with the remaining outstanding principal, together with interest accrued thereon, due in full on March 31, 2015.

On March 31, 2011, the Corporation entered into the Second Amendment to Account Purchase Agreement with Wells Fargo Bank, N.A., which amended its $100,000,000 secured accounts receivable credit facility (the "AR Credit Facility"). As amended, purchases and settlements will be made monthly. Additionally, as amended, borrowings under the AR Credit Facility bear interest at a rate equal to the one-month LIBOR plus 1.35%. Borrowings under the AR Credit Facility are limited based on the balance of the Corporation's accounts receivable and mature on April 20, 2012.

On April 1, 2011, the Corporation borrowed $100,000,000 under the AR Credit Facility, which in addition to proceeds from the Term Loan Facility, was used to repay $242,140,000 of 6.875% Notes that matured on that date. At September 30, 2011, 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 refinance its AR Credit Facility with borrowings that mature in more than twelve months.

The Credit Agreement and the AR Credit Facility, as amended, 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 month period (the "Ratio") to not exceed 3.5x 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.

Accumulated other comprehensive loss includes the unamortized value of terminated forward starting interest rate swap agreements. For the three and nine months ended September 30, 2011, the Corporation recognized $242,000 and $715,000, respectively, as additional interest expense. For the three and nine months ended September 30, 2010, the Corporation recognized $226,000 and $667,000, 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

9 Months Ended

Sep. 30, 2011

Financial Instruments

Financial Instruments

6.	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 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 Financial Corporation 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 (namely, Texas, North Carolina, Georgia, Iowa and Louisiana which accounted for approximately 55% of the Aggregate business' 2010 net sales). The estimated fair values of customer receivables approximate their carrying amounts.

Notes receivable 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 the 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 $1,045,485 and $1,072,235, respectively, at September 30, 2011; $1,030,759 and $1,051,704, respectively, at December 31, 2010; and $1,031,129 and $1,099,298, respectively, at September 30, 2010. The estimated fair value of the Corporation's publicly registered long-term notes and debentures was estimated based on quoted market prices. The estimated fair value of other borrowings approximates its carrying amount.

- 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 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 2: 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 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
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-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 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-Subparagraph a, b
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-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.

Reference 6: 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 7: http://www.xbrl.org/2003/role/presentationRef
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-Number 159
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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+ Details

Income Taxes

9 Months Ended

Sep. 30, 2011

Income Taxes

Income Taxes

7.	Income Taxes

Income tax benefit/expense reported in the Corporation's consolidated statements of earnings includes income tax benefit/expense on earnings attributable to both the Corporation and its noncontrolling interests.


	Nine Months Ended September 30,
	2011	2010
Estimated effective income tax rate:
Continuing operations	22.7%	24.2%

Discontinued operations	38.8%	8.2%

Consolidated overall	22.8%	24.2%

The Corporation's effective income tax rate reflects the effect of federal and state income taxes and the impact of differences in book and tax accounting arising from the net permanent benefits associated with the depletion allowances for mineral reserves and the domestic production deduction. The effective income tax rates for discontinued operations reflect the tax effects of individual operations' transactions and are not indicative of the Corporation's overall effective income tax rate.

The change in the year-to-date consolidated overall estimated effective income tax rate during the third quarter of 2011, when compared with the year-to-date consolidated overall estimated effective tax rate as of June 30, 2011, increased consolidated net earnings for the nine months ended September 30, 2011 by $3,636,000, or $0.08 per diluted share. The consolidated overall estimated effective income tax rate for the nine months ended September 30, 2011 included the following discrete events: the favorable effective settlement of the Internal Revenue Service audit for the 2008 tax year, resolution of a federal tax and interest overpayment related to the 2006 tax year and an agreed-upon refund for the double taxation of the Corporation's wholly-owned Canadian subsidiary for the 2001 and 2002 tax years.

The change in the year-to-date consolidated overall estimated effective income tax rate during the third quarter of 2010, when compared with the year-to-date consolidated overall estimated effective tax rate as of June 30, 2010, increased consolidated net earnings for the nine months ended September 30, 2010 by $5,724,000, or $0.13 per diluted share. The overall estimated effective income tax rate for the nine months ended September 30, 2010 included the effective settlement of issues related to the 2004 and 2005 tax years, the effective settlement of the Internal Revenue Service audit for the 2007 tax year, the expiration of the statute of limitations for federal examination of the 2006 tax year, the provision of a valuation allowance for unused tax credits, and the true-up of the 2009 provision estimates to actual taxes paid as a result of filing the related tax returns during the period.

- 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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph h
-Article 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 136, 172
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Statement of Financial Accounting Standard (FAS)
-Number 109
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-Section S99
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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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+ Details

Pension And Postretirement Benefits

9 Months Ended

Sep. 30, 2011

Pension And Postretirement Benefits

Pension And Postretirement Benefits

8.	Pension and Postretirement Benefits

The following presents the estimated components of the recorded net periodic benefit cost for pension and postretirement benefits (dollars in thousands):

		$12,9961		$12,9961		$12,9961		$12,9961
	Three Months Ended September 30,
	Pension				Postretirement Benefits
	2011		2010		2011		2010
Service cost	$	2,815	$	2,761	$	88	$	137
Interest cost		5,808		5,753		556		688
Expected return on assets		(6,121)		(5,255)		—		—
Amortization of:
Prior service cost (credit)		133		146		(435)		(372)
Actuarial loss (gain)		1,581		2,554		(21)		—
Settlement charge		332		923		—		—

Total net periodic benefit cost	$	4,548	$	6,882	$	188	$	453


	Nine Months Ended September 30,
	Pension				Postretirement Benefits
	2011		2010		2011		2010
Service cost	$	8,446	$	8,282	$	263	$	411
Interest cost		17,425		17,259		1,669		2,063
Expected return on assets		(18,364)		(15,766)		—		—
Amortization of:
Prior service cost (credit)		400		437		(1,306)		(1,117)
Actuarial loss (gain)		4,743		7,661		(64)		—
Settlement charge		346		1,006		—		—

Total net periodic benefit cost	$	12,996	$	18,879	$	562	$	1,357

- Definition

The entire disclosure for pension and other postretirement benefits.

+ References

Reference 1: 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 2: 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 3: 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 4: http://www.xbrl.org/2003/role/presentationRef
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Reference 5: 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 6: 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 7: 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 8: http://www.xbrl.org/2003/role/presentationRef
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
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Reference 11: http://www.xbrl.org/2003/role/presentationRef
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Reference 12: http://www.xbrl.org/2003/role/presentationRef
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Reference 13: http://www.xbrl.org/2003/role/presentationRef
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-Number FAS88
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/topic&trid=2235017

+ Details

Commitments And Contingencies

9 Months Ended

Sep. 30, 2011

Commitments And Contingencies

Commitments and Contingencies

9.	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, 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.

During the nine months ended September 30, 2010, the Corporation settled legal proceedings relating to its Greenwood, Missouri, operation for approximately $7,000,000. In connection with the settlement, the Corporation reversed the excess of the established legal reserve, thereby increasing net earnings for the nine months ended September 30, 2010 by $2,751,000, or $0.06 per diluted share.

Guarantee of Affiliate

In July 2010, the Corporation entered into a reimbursement and indemnification agreement with Fifth Third Bank ("Fifth Third") to guarantee the repayment of amounts borrowed by an affiliate under a $20,000,000 revolving line of credit provided by Fifth Third and a guaranty agreement with Bank of America, N.A., to guarantee $12,400,000 of payment obligations of its affiliate under equipment lease agreements. The affiliate 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. On April 8, 2011, the affiliate converted its equipment leasing agreements with Bank of America, N.A. to a five-year $6,200,000 amortizing loan and the Corporation executed a reaffirmation of guaranty with respect to such loan. On July 20, 2011, the affiliate's $20,000,000 revolving line of credit was increased to $24,000,000. This line of credit expires in July 2013. Additionally, the reimbursement and indemnification agreement related to this line of credit was terminated and replaced by an unconditional guaranty of payment from the Corporation. The affiliate restated its reimbursement and indemnity obligations to the Corporation, and the Corporation retained its subordinate lien on the assets of the affiliate.

- Definition

The entire disclosure for commitments and contingencies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 14
-Paragraph 3
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-SubTopic 20
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-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6449706&loc=d3e16207-108621

+ Details

Business Segments

9 Months Ended

Sep. 30, 2011

Business Segments

Business Segments

10.

Business Segments

The Corporation conducts its aggregates operations through three reportable business segments: Mideast Group, Southeast Group and West Group. The Corporation also has a Specialty Products segment that includes magnesia-based chemicals products and dolomitic lime. These segments are consistent with the Corporation's current management reporting structure.

The following tables display selected financial data for continuing operations for the Corporation's reportable business segments. Corporate loss from operations primarily includes depreciation on capitalized interest, expenses for corporate administrative functions, unallocated corporate expenses and other nonrecurring and/or non-operational adjustments.


	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
	(Dollars in Thousands)
Total revenues:
Mideast Group	$	144,990	$	144,691	$	370,793	$	375,729
Southeast Group		103,832		115,713		287,340		313,251
West Group		230,733		202,895		563,092		521,330

Total Aggregates Business		479,555		463,299		1,221,225		1,210,310
Specialty Products		55,201		46,102		162,990		144,664

Total	$	534,756	$	509,401	$	1,384,215	$	1,354,974


Net sales:
Mideast Group	$	131,579	$	133,607	$	341,308	$	348,524
Southeast Group		84,475		91,216		232,469		251,440
West Group		197,589		176,623		474,070		450,212

Total Aggregates Business		413,643		401,446		1,047,847		1,050,176
Specialty Products		50,342		42,263		149,084		131,878

Total	$	463,985	$	443,709	$	1,196,931	$	1,182,054


Earnings (Loss) from operations:
Mideast Group	$	32,740	$	38,755	$	66,332	$	80,338
Southeast Group		(3,061)		1,414		(20,121)		(144)
West Group		39,659		33,942		53,759		54,654

Total Aggregates Business		69,338		74,111		99,970		134,848
Specialty Products		15,573		12,043		49,984		40,067
Corporate		(5,912)		(2,300)		(14,071)		(13,251)

Total	$	78,999	$	83,854	$	135,883	$	161,664

The asphalt, ready mixed concrete, road paving and other product lines are considered internal customers of the core aggregates business. Product lines for the Specialty Products segment consist of magnesia-based chemicals, dolomitic lime and other. Net sales by product line are as follows:


	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
	(Dollars in Thousands)

Aggregates	$	379,325	$	376,554	$	963,991	$	986,038
Asphalt		13,095		9,833		38,062		29,014
Ready Mixed Concrete		9,750		7,056		22,691		19,558
Road Paving		10,017		6,575		19,425		12,602
Other		1,456		1,428		3,678		2,964

Total Aggregates Business		413,643		401,446		1,047,847		1,050,176

Magnesia-Based Chemicals		36,064		29,290		105,369		89,287
Dolomitic Lime		13,861		12,457		42,743		41,386
Other		417		516		972		1,205

Total Specialty Products		50,342		42,263		149,084		131,878

Total	$	463,985	$	443,709	$	1,196,931	$	1,182,054

- 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 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.

Reference 2: 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 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8933-108599

+ Details

Supplemental Cash Flow Information

9 Months Ended

Sep. 30, 2011

Supplemental Cash Flow Information

Supplemental Cash Flow Information

11.

Supplemental Cash Flow Information

The following table presents the components of the change in other assets and liabilities, net:


	Nine Months Ended September 30,
	2011		2010
	(Dollars in Thousands)

Other current and noncurrent assets	$	2,325	$	3,108
Accrued salaries, benefits and payroll taxes		(2,324)		(2,237	)
Accrued insurance and other taxes		8,366		8,134
Accrued income taxes		22,208		11,177
Accrued pension, postretirement and postemployment benefits		(16,046)		(10,849	)
Other current and noncurrent liabilities		10,450		3,306

	$	24,979	$	12,639

Significant Accounting Policies (Policy)	9 Months Ended
Significant Accounting Policies (Policy)	Sep. 30, 2011
Significant Accounting Policies
Basis Of Presentation	Basis of Presentation The accompanying unaudited consolidated financial statements of Martin Marietta Materials, Inc. (the "Corporation") have been prepared in accordance with generally accepted accounting principles for interim financial information and with the instructions to the Quarterly Report on Form 10-Q and to Article 10 of Regulation S-X. The Corporation has continued to follow the accounting policies set forth in the audited consolidated financial statements and related notes thereto included in the Corporation's Annual Report on Form 10-K for the year ended December 31, 2010, filed with the Securities and Exchange Commission on February 25, 2011. In the opinion of management, the interim financial information provided herein reflects all adjustments, consisting of normal recurring accruals, necessary for a fair presentation of the results of operations, financial position and cash flows for the interim periods. The results of operations for the quarter and nine months ended September 30, 2011 are not indicative of the results expected for other interim periods or the full year. The balance sheet at December 31, 2010 has been derived from the audited financial statements at that date but does not include all of the information and notes required by generally accepted accounting principles for complete financial statements. These financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Corporation's Annual Report on Form 10-K for the year ended December 31, 2010.
Earnings Per Common Share	Earnings per Common Share 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.
Comprehensive Earnings/Loss	Comprehensive Earnings/Loss Consolidated comprehensive earnings/loss for the Corporation consists of consolidated net earnings or loss; 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. Consolidated comprehensive earnings for the three and nine months ended September 30, 2011 was $50,091,000 and $72,592,000, respectively. Consolidated comprehensive earnings for the three and nine months ended September 30, 2010 was $55,495,000 and $91,293,000, respectively.

- Definition

Disclosure of accounting policy for computing basic and diluted earnings or loss per share for each class of common stock and participating security. Addresses all significant policy factors, including any antidilutive items that have been excluded from the computation and takes into account stock dividends, splits and reverse splits that occur after the balance sheet date of the latest reporting period but before the issuance of the financial statements.

+ References + Details

Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2011

Significant Accounting Policies

Basic And Diluted Earnings Per Common Share


	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
	(In Thousands)
Net earnings from continuing operations attributable to Martin Marietta Materials, Inc.	$	48,909	$	51,968	$	67,350	$	82,074
Less: Distributed and undistributed earnings attributable to unvested awards		378		529		557		865

Basic and diluted net earnings available to common shareholders from continuing operations attributable to Martin Marietta Materials, Inc.		48,531		51,439		66,793		81,209
Basic and diluted net earnings available to common shareholders from discontinued operations		247		22		191		135

Basic and diluted net earnings available to common shareholders attributable to Martin Marietta Materials, Inc.	$	48,778	$	51,461	$	66,984	$	81,344


Basic weighted-average common shares outstanding		45,690		45,526		45,634		45,463

Effect of dilutive employee and director awards		109		152		149		176

Diluted weighted-average common shares outstanding		45,799		45,678		45,783		45,639

Business Combinations And Discontinued Operations (Tables)

9 Months Ended

Sep. 30, 2011

Business Combinations And Discontinued Operations

Components Of Discontinued Operations


	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
	(Dollars in Thousands)

Net sales	$	27	$	44	$	94	$	102


Pretax gain (loss) on operations	$	385	$	(15)	$	312	$	147
Income tax expense (benefit)		138		(37)		121		12

Net earnings	$	247	$	22	$	191	$	135

- 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

Inventories, Net (Tables)

9 Months Ended

Sep. 30, 2011

Inventories, Net

Components Of Inventories


	September 30, 2011		December 31, 2010		September 30, 2010
	(Dollars in Thousands)

Finished products	$	362,924	$	358,138	$	350,842
Products in process and raw materials		9,483		13,842		14,310
Supplies and expendable parts		53,624		46,958		46,566

		426,031		418,938		411,718
Less allowances		(88,301)		(87,044)		(87,898)

Total	$	337,730	$	331,894	$	323,820

Goodwill And Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2011

Goodwill And Intangible Assets

Changes In Goodwill


	Nine Months Ended September 30, 2011
	Mideast Group		Southeast Group		West Group		Total

Balance at beginning of period	$	122,052	$	105,870	$	398,605	$	626,527
Acquisitions		—		—		12,512		12,512

Balance at end of period	$	122,052	$	105,870	$	411,117	$	639,039

- Definition

Tabular disclosure of goodwill by reportable segment and in total. Disclosure details may include, but are not limited to, the carrying amount of goodwill, goodwill acquired during the year, goodwill impairment losses recognized, goodwill written-off due to the sale of a business unit, goodwill not yet allocated, and any other changes to goodwill.

+ References + Details

Long-Term Debt (Tables)

9 Months Ended

Sep. 30, 2011

Long-Term Debt

Long-Term Debt


	September 30, 2011		December 31, 2010		September 30, 2010
	(Dollars in Thousands)

6.6% Senior Notes, due 2018	$	298,428	$	298,288	$	298,242
7% Debentures, due 2025		124,411		124,393		124,388
6.25% Senior Notes, due 2037		247,906		247,882		247,874
6.875% Notes, due 2011		—		242,129		242,118
Term Loan Facility, due 2015, interest rate of 1.99% at September 30, 2011		250,000		—		—
Term Loan, due 2012, interest rate of 3.29% at December 31, 2010		—		111,750		111,750
Revolving Facility, interest rate of 1.61% at September 30, 2011		20,000		—		—
AR Credit Facility, interest rate of 1.60% at September 30, 2011		100,000		—		—
Other notes		4,740		6,317		6,757

Total debt		1,045,485		1,030,759		1,031,129
Less current maturities		(7,150)		(248,714)		(245,423)

Long-term debt	$	1,038,335	$	782,045	$	785,706

Commitment Amounts Under Senior Unsecured Credit Facilities


Lender	Revolving Facility Commitment		Term Loan Facility Commitment
	(Dollars in Thousands)

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

- 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 SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 22
-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
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-Subparagraph (SX 210.4-08.(e),(f))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

+ Details

Income Taxes (Tables)

9 Months Ended

Sep. 30, 2011

Income Taxes

Estimated Effective Income Tax Rate


	Nine Months Ended September 30,
	2011	2010
Estimated effective income tax rate:
Continuing operations	22.7%	24.2%

Discontinued operations	38.8%	8.2%

Consolidated overall	22.8%	24.2%

Pension And Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2011

Pension And Postretirement Benefits

Estimated Components Of The Recorded Net Periodic Benefit Cost For Pension And Postretirement Benefits

8.	Pension and Postretirement Benefits

The following presents the estimated components of the recorded net periodic benefit cost for pension and postretirement benefits (dollars in thousands):

		$12,9961		$12,9961		$12,9961		$12,9961
	Three Months Ended September 30,
	Pension				Postretirement Benefits
	2011		2010		2011		2010
Service cost	$	2,815	$	2,761	$	88	$	137
Interest cost		5,808		5,753		556		688
Expected return on assets		(6,121)		(5,255)		—		—
Amortization of:
Prior service cost (credit)		133		146		(435)		(372)
Actuarial loss (gain)		1,581		2,554		(21)		—
Settlement charge		332		923		—		—

Total net periodic benefit cost	$	4,548	$	6,882	$	188	$	453


	Nine Months Ended September 30,
	Pension				Postretirement Benefits
	2011		2010		2011		2010
Service cost	$	8,446	$	8,282	$	263	$	411
Interest cost		17,425		17,259		1,669		2,063
Expected return on assets		(18,364)		(15,766)		—		—
Amortization of:
Prior service cost (credit)		400		437		(1,306)		(1,117)
Actuarial loss (gain)		4,743		7,661		(64)		—
Settlement charge		346		1,006		—		—

Total net periodic benefit cost	$	12,996	$	18,879	$	562	$	1,357

Business Segments (Tables)

9 Months Ended

Sep. 30, 2011

Business Segments

Financial Data For Continuing Operations For The Corporation's Reportable Business Segments


	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
	(Dollars in Thousands)
Total revenues:
Mideast Group	$	144,990	$	144,691	$	370,793	$	375,729
Southeast Group		103,832		115,713		287,340		313,251
West Group		230,733		202,895		563,092		521,330

Total Aggregates Business		479,555		463,299		1,221,225		1,210,310
Specialty Products		55,201		46,102		162,990		144,664

Total	$	534,756	$	509,401	$	1,384,215	$	1,354,974


Net sales:
Mideast Group	$	131,579	$	133,607	$	341,308	$	348,524
Southeast Group		84,475		91,216		232,469		251,440
West Group		197,589		176,623		474,070		450,212

Total Aggregates Business		413,643		401,446		1,047,847		1,050,176
Specialty Products		50,342		42,263		149,084		131,878

Total	$	463,985	$	443,709	$	1,196,931	$	1,182,054


Earnings (Loss) from operations:
Mideast Group	$	32,740	$	38,755	$	66,332	$	80,338
Southeast Group		(3,061)		1,414		(20,121)		(144)
West Group		39,659		33,942		53,759		54,654

Total Aggregates Business		69,338		74,111		99,970		134,848
Specialty Products		15,573		12,043		49,984		40,067
Corporate		(5,912)		(2,300)		(14,071)		(13,251)

Total	$	78,999	$	83,854	$	135,883	$	161,664

Net Sales By Product Line


	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
	(Dollars in Thousands)

Aggregates	$	379,325	$	376,554	$	963,991	$	986,038
Asphalt		13,095		9,833		38,062		29,014
Ready Mixed Concrete		9,750		7,056		22,691		19,558
Road Paving		10,017		6,575		19,425		12,602
Other		1,456		1,428		3,678		2,964

Total Aggregates Business		413,643		401,446		1,047,847		1,050,176

Magnesia-Based Chemicals		36,064		29,290		105,369		89,287
Dolomitic Lime		13,861		12,457		42,743		41,386
Other		417		516		972		1,205

Total Specialty Products		50,342		42,263		149,084		131,878

Total	$	463,985	$	443,709	$	1,196,931	$	1,182,054

- 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)

9 Months Ended

Sep. 30, 2011

Supplemental Cash Flow Information

Components Of Change In Other Assets And Liabilities, Net


	Nine Months Ended September 30,
	2011		2010
	(Dollars in Thousands)

Other current and noncurrent assets	$	2,325	$	3,108
Accrued salaries, benefits and payroll taxes		(2,324)		(2,237	)
Accrued insurance and other taxes		8,366		8,134
Accrued income taxes		22,208		11,177
Accrued pension, postretirement and postemployment benefits		(16,046)		(10,849	)
Other current and noncurrent liabilities		10,450		3,306

	$	24,979	$	12,639

Significant Accounting Policies (Basic And Diluted Earnings Per Common Share) (Details) - USD ($) shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Significant Accounting Policies
Net earnings from continuing operations attributable to Martin Marietta Materials, Inc.	$ 48,909,000	$ 51,968,000	$ 67,350,000	$ 82,074,000
Less: Distributed and undistributed earnings attributable to unvested awards	378,000	529,000	557,000	865,000
Basic and diluted net earnings available to common shareholders from continuing operations attributable to Martin Marietta Materials, Inc.	48,531,000	51,439,000	66,793,000	81,209,000
Basic and diluted net earnings available to common shareholders from discontinued operations	247,000	22,000	191,000	135,000
Basic and diluted net earnings available to common shareholders attributable to Martin Marietta Materials, Inc.	$ 48,778,000	$ 51,461,000	$ 66,984,000	$ 81,344,000
Basic weighted-average common shares outstanding	45,690	45,526	45,634	45,463
Effect of dilutive employee and director awards	109	152	149	176
Diluted weighted-average common shares outstanding	45,799	45,678	45,783	45,639
Consolidated comprehensive earnings	$ 50,091,000	$ 55,495,000	$ 72,592,000	$ 91,293,000

Business Combinations And Discontinued Operations (Narrative) (Details) T in Millions	1 Months Ended	9 Months Ended
	May 31, 2011 USD ($)	Sep. 30, 2011 USD ($) T
Business Combinations And Discontinued Operations
Noncontrolling interest, ownership percentage by noncontrolling owners	1.00%
Purchase of remaining interest in existing limited liability company	$ 10,394,000	$ 10,394,000
Elimination of noncontrolling interest	3,439,000	$ (7,176,000)
Additional paid-in capital	3,737,000
Deferred tax asset	$ 3,218,000
Tons of limestone reserves acquired with acquisition \| T		200

Business Combinations And Discontinued Operations (Components Of Discontinued Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Business Combinations And Discontinued Operations
Net sales	$ 27	$ 44	$ 94	$ 102
Pretax gain (loss) on operations	385	(15)	312	147
Income tax expense (benefit)	138	(37)	121	12
Net earnings	$ 247	$ 22	$ 191	$ 135

- Definition

Income tax expense or benefit attributable to Income or Loss from discontinued operations during the phase-out period.

+ References + Details

- Definition

This element represents the overall income (loss) from a disposal group apportioned to the parent that is classified as a component of the entity, net of income tax, reported as a separate component of income before extraordinary items after deduction or consideration of the amount which may be allocable to noncontrolling interests, if any. Includes the following (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

Inventories, Net (Components Of Inventories) (Details) - USD ($) $ in Thousands	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2010
Inventories, Net
Finished products	$ 362,924	$ 358,138	$ 350,842
Products in process and raw materials	9,483	13,842	14,310
Supplies and expendable parts	53,624	46,958	46,566
Inventories, Gross	426,031	418,938	411,718
Less allowances	(88,301)	(87,044)	(87,898)
Total	$ 337,730	$ 331,894	$ 323,820

- 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 SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 6
-Subparagraph a
-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 43
-Chapter 3
-Section A
-Paragraph 9
-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 AICPA
-Name Accounting Research Bulletin (ARB)
-Number 43
-Chapter 4
-Paragraph 14
-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 AICPA
-Name Accounting Research Bulletin (ARB)
-Number 43
-Chapter 4
-Paragraph 8, 9, 14
-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 SEC
-Name Regulation S-X (SX)
-Number 210
-Section 09
-Article 12

Reference 6: 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 7: 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 8: 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 9: 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

+ Details

- Definition

Carrying amount as of the balance sheet date of products used directly or indirectly in the manufacturing or production process, which may or may not become part of the final product. May also include items used in the storage, presentation or transportation of physical goods.

+ References + Details

Goodwill And Intangible Assets (Changes In Goodwill) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2011 USD ($)
Goodwill, Beginning Balance	$ 626,527
Acquisitions	12,512
Balance at end of period	639,039
Mideast Group [Member]
Goodwill, Beginning Balance	122,052
Balance at end of period	122,052
Southeast Group [Member]
Goodwill, Beginning Balance	105,870
Balance at end of period	105,870
West Group [Member]
Goodwill, Beginning Balance	398,605
Acquisitions	12,512
Balance at end of period	$ 411,117

- 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 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 2: 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 3: 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 4: 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 5: 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=6905597&loc=d3e13816-109267

Reference 6: 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 7: 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 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

Long-Term Debt (Narrative) (Details) - USD ($)	1 Months Ended		3 Months Ended			9 Months Ended		12 Months Ended
Long-Term Debt (Narrative) (Details) - USD ($)	Apr. 30, 2011	Mar. 31, 2011	Sep. 30, 2011	Mar. 31, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Long-term debt			$ 1,045,485,000		$ 1,031,129,000	$ 1,045,485,000	$ 1,031,129,000	$ 1,030,759,000
Line of credit facility, interest rate description				one-month LIBOR plus 1.35%		one-month LIBOR plus 1%
Annual principal payment of debt				$ 5,000,000
Repayment of debt		$ 111,750,000
Debt instrument interest rate						the Federal Funds rate plus 0.5%
Debt instrument maturity period		March 31, 2015				April 20, 2012
Additional interest expense			$ 242,000		226,000	$ 715,000	667,000
6.875% Notes, Due 2011 [Member]
Floating rate senior note repaid	$ 242,140,000
Long-term debt					242,118,000		242,118,000	242,129,000
Debt instrument maturity period						2011
Interest rate on notes	6.875%		6.875%			6.875%
6.6% Senior Notes, Due 2018 [Member]
Long-term debt			$ 298,428,000		$ 298,242,000	$ 298,428,000	$ 298,242,000	298,288,000
Debt instrument maturity period						2018
Interest rate on notes			6.60%			6.60%
Increase in annual interest expense due to ongoing amortization of the terminated value of the swap agreements								$ 1,000,000
Term Loan Due 2012 [Member]
Debt instrument maturity period		2012
Term Loan Facility [Member]
Credit facility commitment		$ 250,000,000		250,000,000
Revolving Credit Facility [Member]
Credit facility commitment		350,000,000		350,000,000
AR Credit Facility [Member]
Credit facility commitment		$ 100,000,000		$ 100,000,000
Outstanding borrowing under credit facility			$ 100,000,000			$ 100,000,000
Additional borrowings under AR credit facility	$ 100,000,000
Unrestricted Cash Reduction [Member]
Debt covenant						<div class="MetaData"> <p style="margin-top: 12px; margin-bottom: 0px; margin-left: 3%;" align="justify"><font style="font-family: Times New Roman;" class="_mt" size="3">The Credit Agreement and the AR Credit Facility, as amended, 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 month period (the "Ratio") to not exceed <font class="_mt">3.5x </font>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 <font class="_mt">3.75x</font>. <font class="_mt">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 $<font class="_mt">50,000,000</font>, such reduction not to exceed $<font class="_mt">200,000,000</font>, for purposes of the covenant calculation.</font> </font></p></div>
Including Acquisition Bridge Debt [Member]
Debt covenant						3.5x
Excluding Acquisition Bridge Debt [Member]
Debt covenant						3.75x
Maximum [Member] \| Unrestricted Cash Reduction [Member]
Reduction of consolidated debt in the debt ratio calculation						$ 200,000,000
Minimum [Member] \| Unrestricted Cash Reduction [Member]
Reduction of consolidated debt in the debt ratio calculation						$ 50,000,000

Long-Term Debt (Long-Term Debt) (Details) - USD ($)	1 Months Ended	9 Months Ended
Long-Term Debt (Long-Term Debt) (Details) - USD ($)	Mar. 31, 2011	Sep. 30, 2011	Apr. 30, 2011	Dec. 31, 2010	Sep. 30, 2010
Total debt		$ 1,045,485,000		$ 1,030,759,000	$ 1,031,129,000
Less current maturities		(7,150,000)		(248,714,000)	(245,423,000)
Long-term debt		$ 1,038,335,000		782,045,000	785,706,000
Maturity date	March 31, 2015	April 20, 2012
6.6% Senior Notes, Due 2018 [Member]
Total debt		$ 298,428,000		298,288,000	298,242,000
Interest rate on notes		6.60%
Maturity date		2018
7% Debentures, Due 2025 [Member]
Total debt		$ 124,411,000		124,393,000	124,388,000
Interest rate on notes		7.00%
Maturity date		2025
6.25% Senior Notes, Due 2037 [Member]
Total debt		$ 247,906,000		247,882,000	247,874,000
Interest rate on notes		6.25%
Maturity date		2037
6.875% Notes, Due 2011 [Member]
Total debt				242,129,000	242,118,000
Interest rate on notes		6.875%	6.875%
Maturity date		2011
Term Loan Facility, Due 2015, Interest Rate Of 1.99% At September 30, 2011 [Member]
Total debt		$ 250,000,000
Interest rate on term loan		1.99%
Maturity date		2015
Term Loan, Due 2012, Interest Rate Of 3.29% At December 31, 2010 [Member]
Total debt				111,750,000	111,750,000
Interest rate on term loan		3.29%
Maturity date		2012
Revolving Facility, Interest Rate Of 1.61% At September 30, 2011 [Member]
Credit Facility		$ 20,000,000
Credit Facility interest rate		1.61%
AR Credit Facility, Interest Rate Of 1.60% At September 30, 2011 [Member]
Credit Facility		$ 100,000,000
Credit Facility interest rate		1.60%
Other Notes [Member]
Other notes		$ 4,740,000		$ 6,317,000	$ 6,757,000
AR Credit Facility [Member]
Credit Facility		$ 100,000,000

Long-Term Debt (Senior Unsecured Credit Facilities) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2011 USD ($)
Revolving Facility Commitment	$ 350,000
Term Loan Facility Commitment	250,000
JPMorgan Chase Bank [Member]
Revolving Facility Commitment	46,667
Term Loan Facility Commitment	33,333
Wells Fargo Bank [Member]
Revolving Facility Commitment	46,667
Term Loan Facility Commitment	33,333
SunTrust Bank [Member]
Revolving Facility Commitment	46,667
Term Loan Facility Commitment	33,333
Branch Banking And Trust Company [Member]
Revolving Facility Commitment	46,667
Term Loan Facility Commitment	33,333
Bank Of America [Member]
Revolving Facility Commitment	46,667
Term Loan Facility Commitment	33,333
Citibank [Member]
Revolving Facility Commitment	29,167
Term Loan Facility Commitment	20,833
Deutsche Bank AG New York Branch [Member]
Revolving Facility Commitment	29,167
Term Loan Facility Commitment	20,833
The Northern Trust Company [Member]
Revolving Facility Commitment	29,167
Term Loan Facility Commitment	20,833
Comerica Bank [Member]
Revolving Facility Commitment	14,582
Term Loan Facility Commitment	10,418
Regions Bank [Member]
Revolving Facility Commitment	14,582
Term Loan Facility Commitment	$ 10,418

Financial Instruments (Details) - USD ($)	9 Months Ended
Financial Instruments (Details) - USD ($)	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2010
Financial Instruments
Maturities of cash equivalents	three
Percentage of customer sales in top five sales states for aggregate business	55.00%
Long-term notes and debentures, carrying value	$ 1,045,485	$ 1,030,759	$ 1,031,129
Long-term notes and debentures, fair value	$ 1,072,235	$ 1,051,704	$ 1,099,298

Income Taxes (Narrative) (Details) - USD ($)	9 Months Ended
Income Taxes (Narrative) (Details) - USD ($)	Sep. 30, 2011	Sep. 30, 2010
Income Taxes
Increase in consolidated net earnings	$ 3,636,000	$ 5,724,000
Increase in per diluted share	$ 0.08	$ 0.13

Income Taxes (Estimated Effective Income Tax Rate) (Details)	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Income Taxes
Continuing operations	22.70%	24.20%
Discontinued operations	38.80%	8.20%
Consolidated overall	22.80%	24.20%

Pension And Postretirement Benefits (Estimated Components Of The Recorded Net Periodic Benefit Cost For Pension And Postretirement Benefits) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Pension [Member]
Service cost	$ 2,815	$ 2,761	$ 8,446	$ 8,282
Interest cost	5,808	5,753	17,425	17,259
Expected return on assets	(6,121)	(5,255)	(18,364)	(15,766)
Prior service cost (credit)	133	146	400	437
Actuarial loss (gain)	1,581	2,554	4,743	7,661
Settlement charge (adjustment)	332	923	346	1,006
Total net periodic benefit cost	4,548	6,882	12,996	18,879
Postretirement Benefits [Member]
Service cost	88	137	263	411
Interest cost	556	688	1,669	2,063
Expected return on assets
Prior service cost (credit)	(435)	(372)	(1,306)	(1,117)
Actuarial loss (gain)	(21)		(64)
Settlement charge (adjustment)
Total net periodic benefit cost	$ 188	$ 453	$ 562	$ 1,357

- Definition

An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets.

+ References

+ Details

- Definition

The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

+ References + Details

- Definition

The amount of net gain (loss) recognized in net periodic benefit cost as a result of an irrevocable action that relieves the employer (or the plan) of primary responsibility for a benefit obligation and eliminates significant risks related to the obligation and the assets used to effect the settlement. Examples of transactions that constitute a settlement include (a) making lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and (b) purchasing nonparticipating annuity contracts to cover vested benefits.

+ References

+ Details

- Definition

The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

+ References

Reference 1: 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 2: 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 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph a, 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 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Service Cost (Component of Net Periodic Pension Cost)
-URI http://asc.fasb.org/extlink&oid=6525008

+ Details

Commitments And Contingencies (Details)		1 Months Ended	9 Months Ended
Commitments And Contingencies (Details)	Apr. 08, 2011 USD ($)	Jul. 31, 2010 USD ($)	Sep. 30, 2011	Sep. 30, 2010 USD ($) $ / shares	Jul. 31, 2011 USD ($)	Jul. 20, 2011 USD ($)
Commitments And Contingencies
Settled to legal proceedings				$ 7,000,000
Increase in net earnings				$ 2,751,000
Increase in earnings per diluted share \| $ / shares				$ 0.06
Payment obligation of affiliate		$ 12,400,000
Guarantee of affiliate's obligations	$ 6,200,000					$ 24,000,000
Term of equipment leasing agreements (in years)	5
Prior guarantee obligations maximum exposure					$ 20,000,000
Line of credit maturity period			July 2013

Business Segments (Financial Data For Continuing Operations For The Corporation's Reportable Business Segments) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Total revenues	$ 534,756	$ 509,401	$ 1,384,215	$ 1,354,974
Net sales, Total	463,985	443,709	1,196,931	1,182,054
Earnings (Loss) from operations, Total	78,999	83,854	135,883	161,664
Total Aggregates Business [Member]
Total revenues	479,555	463,299	1,221,225	1,210,310
Net sales, Total	413,643	401,446	1,047,847	1,050,176
Earnings (Loss) from operations, Total	69,338	74,111	99,970	134,848
Specialty Products [Member]
Total revenues	55,201	46,102	162,990	144,664
Net sales, Total	50,342	42,263	149,084	131,878
Earnings (Loss) from operations, Total	15,573	12,043	49,984	40,067
Mideast Group [Member]
Total revenues	144,990	144,691	370,793	375,729
Net sales, Total	131,579	133,607	341,308	348,524
Earnings (Loss) from operations, Total	32,740	38,755	66,332	80,338
Southeast Group [Member]
Total revenues	103,832	115,713	287,340	313,251
Net sales, Total	84,475	91,216	232,469	251,440
Earnings (Loss) from operations, Total	(3,061)	1,414	(20,121)	(144)
West Group [Member]
Total revenues	230,733	202,895	563,092	521,330
Net sales, Total	197,589	176,623	474,070	450,212
Earnings (Loss) from operations, Total	39,659	33,942	53,759	54,654
Corporate [Member]
Earnings (Loss) from operations, Total	$ (5,912)	$ (2,300)	$ (14,071)	$ (13,251)

Business Segments (Net Sales By Product Line) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Net Sales	$ 463,985	$ 443,709	$ 1,196,931	$ 1,182,054
Aggregates [Member]
Net Sales	379,325	376,554	963,991	986,038
Asphalt [Member]
Net Sales	13,095	9,833	38,062	29,014
Ready Mixed Concrete [Member]
Net Sales	9,750	7,056	22,691	19,558
Road Paving [Member]
Net Sales	10,017	6,575	19,425	12,602
Other Product Line [Member]
Net Sales	1,456	1,428	3,678	2,964
Total Aggregates Business [Member]
Net Sales	413,643	401,446	1,047,847	1,050,176
Magnesia-Based Chemicals [Member]
Net Sales	36,064	29,290	105,369	89,287
Dolomitic Lime [Member]
Net Sales	13,861	12,457	42,743	41,386
Others [Member]
Net Sales	417	516	972	1,205
Specialty Products [Member]
Net Sales	$ 50,342	$ 42,263	$ 149,084	$ 131,878

Supplemental Cash Flow Information (Components Of Change In Other Assets And Liabilities, Net) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Supplemental Cash Flow Information
Other current and noncurrent assets	$ 2,325	$ 3,108
Accrued salaries, benefits and payroll taxes	(2,324)	(2,237)
Accrued insurance and other taxes	8,366	8,134
Accrued income taxes	22,208	11,177
Accrued pension, postretirement and postemployment benefits	(16,046)	(10,849)
Other current and noncurrent liabilities	10,450	3,306
Other assets and liabilities, net	$ 24,979	$ 12,639