Entity Central Index Key Cover [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Shell Company Entity Shell Company Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Title of 12(b) Security Security12b Title Security Exchange Name Security Exchange Name Entity File Number Entity File Number Entity Current Reporting Status Entity Current Reporting Status Entity Interactive Data Current Entity Interactive Data Current Entity Incorporation, State or Country Code Entity Incorporation State Country Code Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address Address Line1 Entity Address, City or Town Entity Address City Or Town Entity Address, State or Province Entity Address State Or Province Entity Address, Postal Zip Code Entity Address Postal Zip Code City Area Code City Area Code Local Phone Number Local Phone Number Document Quarterly Report Document Quarterly Report Document Transition Report Document Transition Report Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Accrued salaries benefits and payroll taxes. Accrued insurance and other taxes. Statement Of Financial Position [Abstract] ASSETS Assets [Abstract] Current Assets: Assets Current [Abstract] Cash and cash equivalents Cash And Cash Equivalents At Carrying Value Restricted cash Restricted Cash Accounts receivable, net Accounts Receivable Net Current Inventories, net Inventory Net Other current assets Other Assets Current Total Current Assets Assets Current Property, plant and equipment Property Plant And Equipment Gross Allowances for depreciation, depletion and amortization Accumulated Depreciation Depletion And Amortization Property Plant And Equipment Net property, plant and equipment Property Plant And Equipment Net Goodwill Goodwill Other intangibles, net Other Intangible Assets Net Operating lease right-of-use assets, net Operating Lease Right Of Use Asset Other noncurrent assets Other Assets Noncurrent Total Assets Assets LIABILITIES AND EQUITY Liabilities And Stockholders Equity [Abstract] Current Liabilities: Liabilities Current [Abstract] Accounts payable Accounts Payable Current Accrued salaries, benefits and payroll taxes Accrued Salaries Benefits And Payroll Taxes Accrued insurance and other taxes Accrued Insurance And Other Taxes Current maturities of long-term debt and short-term facilities Long Term Debt Current Operating lease liabilities Operating Lease Liability Current Other current liabilities Other Liabilities Current Total Current Liabilities Liabilities Current Long-term debt Long Term Debt Noncurrent Deferred income taxes, net Deferred Income Tax Liabilities Net Noncurrent operating lease liabilities Operating Lease Liability Noncurrent Other noncurrent liabilities Other Liabilities Noncurrent Total Liabilities Liabilities Equity: Stockholders Equity Including Portion Attributable To Noncontrolling Interest [Abstract] Common stock, par value $0.01 per share Common Stock Value Preferred stock, par value $0.01 per share Preferred Stock Value Additional paid-in capital Additional Paid In Capital Common Stock Accumulated other comprehensive loss Accumulated Other Comprehensive Income Loss Net Of Tax Retained earnings Retained Earnings Accumulated Deficit Total Shareholders' Equity Stockholders Equity Noncontrolling interests Minority Interest Total Equity Stockholders Equity Including Portion Attributable To Noncontrolling Interest Total Liabilities and Equity Liabilities And Stockholders Equity Common stock, par value Common Stock Par Or Stated Value Per Share Preferred stock, par value Preferred Stock Par Or Stated Value Per Share Income Statement [Abstract] Statement [Table] Statement [Table] Product and Service Product Or Service [Axis] Product and Service Products And Services [Domain] Products and services. Products and Services Products And Services [Member] Freight Cargo And Freight [Member] Statement [Line Items] Statement [Line Items] Total Revenues Revenue From Contract With Customer Excluding Assessed Tax Total Cost of Revenues Cost Of Goods And Services Sold Gross Profit Gross Profit Selling, general & administrative expenses Selling General And Administrative Expense Acquisition-related expenses Business Combination Acquisition Related Costs Other operating income, net Other Operating Income Expense Net Earnings from Operations Operating Income Loss Interest expense Interest Expense Other nonoperating (income) and expenses, net Other Nonoperating Income Expense Earnings before income tax expense Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest Income tax expense Income Tax Expense Benefit Consolidated net earnings Profit Loss Less: Net earnings attributable to noncontrolling interests Net Income Loss Attributable To Noncontrolling Interest Net Earnings Attributable to Martin Marietta Materials, Inc. Net Income Loss Consolidated Comprehensive Earnings: Comprehensive Income Net Of Tax [Abstract] Earnings attributable to Martin Marietta Materials, Inc. Comprehensive Income Net Of Tax Earnings attributable to noncontrolling interests Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest Net Earnings Attributable to Martin Marietta Materials, Inc. Per Common Share: Earnings Per Share [Abstract] Basic attributable to common shareholders Earnings Per Share Basic Diluted attributable to common shareholders Earnings Per Share Diluted Weighted-Average Common Shares Outstanding: Weighted Average Number Of Shares Outstanding [Abstract] Basic Weighted Average Number Of Shares Outstanding Basic Diluted Weighted Average Number Of Diluted Shares Outstanding Statement Of Cash Flows [Abstract] Cash Flows from Operating Activities: Net Cash Provided By Used In Operating Activities [Abstract] Consolidated net earnings Adjustments to reconcile consolidated net earnings to net cash provided by operating activities: Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] Depreciation, depletion and amortization Depreciation Depletion And Amortization Stock-based compensation expense Share Based Compensation Gain on divestitures and sales of assets Gain Loss On Disposition Of Assets Deferred income taxes Deferred Income Tax Expense Benefit Other items, net Other Noncash Income Expense Changes in operating assets and liabilities, net of effects of acquisitions and divestitures: Increase Decrease In Operating Capital [Abstract] Accounts receivable, net Increase Decrease In Accounts Receivable Inventories, net Increase Decrease In Inventories Accounts payable Increase Decrease In Accounts Payable Trade Other assets and liabilities, net Increase Decrease In Other Operating Capital Net Net Cash Provided by Operating Activities Net Cash Provided By Used In Operating Activities Cash Flows from Investing Activities: Net Cash Provided By Used In Investing Activities [Abstract] Additions to property, plant and equipment Payments To Acquire Property Plant And Equipment Acquisitions, net Payments To Acquire Businesses Gross Proceeds from divestitures and sales of assets Proceeds From Sales Of Business Affiliate And Productive Assets Investments in life insurance contracts, net Payments For Proceeds From Life Insurance Policies Other investing activities, net Payments For Proceeds From Other Investing Activities Net Cash Used for Investing Activities Net Cash Provided By Used In Investing Activities Cash Flows from Financing Activities: Net Cash Provided By Used In Financing Activities [Abstract] Borrowings of debt Proceeds From Issuance Of Debt Repayments of debt Repayments Of Debt Payments on financing leases Finance Lease Principal Payments Debt issuance costs Payments Of Debt Issuance Costs Distributions to owners of noncontrolling interest Payments Of Dividends Minority Interest Repurchases of common stock Payments For Repurchase Of Common Stock Dividends paid Payments Of Dividends Common Stock Proceeds from exercise of stock options Proceeds From Stock Options Exercised Shares withheld for employees' income tax obligations Payments Related To Tax Withholding For Share Based Compensation Net Cash Used for Financing Activities Net Cash Provided By Used In Financing Activities Net Increase in Cash, Cash Equivalents and Restricted Cash Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect Cash, Cash Equivalents and Restricted Cash, beginning of period Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations Cash, Cash Equivalents and Restricted Cash, end of period Statement Of Stockholders Equity [Abstract] Equity Components Statement Equity Components [Axis] Equity Component Equity Component [Domain] Common Stock Common Stock [Member] Additional Paid-in Capital Additional Paid In Capital [Member] Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Income [Member] Retained Earnings Retained Earnings [Member] Total Shareholders' Equity Parent [Member] Noncontrolling Interests Noncontrolling Interest [Member] Beginning Balance Beginning Balance (in shares) Common Stock Shares Outstanding Consolidated net earnings Other comprehensive earnings, net of tax Other Comprehensive Income Loss Net Of Tax Dividends declared Dividends Common Stock Cash Issuances of common stock for stock award plans Stock Issued During Period Value Share Based Compensation Issuances of common stock for stock award plans (in shares) Stock Issued During Period Shares Share Based Compensation Shares withheld for employees' income tax obligations Adjustments Related To Tax Withholding For Share Based Compensation Repurchases of common stock Stock Repurchased During Period Value Repurchases of common stock, Shares Stock Repurchased During Period Shares Stock-based compensation expense Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value Distributions to owners of noncontrolling interest Minority Interest Decrease From Distributions To Noncontrolling Interest Holders Ending Balance Ending Balance (in shares) Dividends declared Common Stock Dividends Per Share Declared Accounting Policies [Abstract] Significant Accounting Policies Organization Consolidation Basis Of Presentation Business Description And Accounting Policies [Text Block] Revenue From Contract With Customer [Abstract] Revenue Recognition Revenue From Contract With Customer [Text Block] Business Combinations [Abstract] Acquisitions Business Combination Disclosure [Text Block] Inventory Disclosure [Abstract] Inventories, Net Inventory Disclosure [Text Block] Debt Disclosure [Abstract] Long-Term Debt Debt Disclosure [Text Block] Financial instruments disclosure. Financial Instruments Disclosure [Abstract] Financial Instruments Financial Instruments Disclosure [Text Block] Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Compensation And Retirement Disclosure [Abstract] Pension and Postretirement Benefits Pension And Other Postretirement Benefits Disclosure [Text Block] Commitments And Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments And Contingencies Disclosure [Text Block] Segment Reporting [Abstract] Business Segments Segment Reporting Disclosure [Text Block] Revenues and gross profit. Revenues and gross profit. Revenues And Gross Profit [Abstract] Revenues and Gross Profit Revenues And Gross Profit [Text Block] Supplemental Cash Flow Elements [Abstract] Supplemental Cash Flow Information Cash Flow Supplemental Disclosures [Text Block] Other Income And Expenses [Abstract] Other Operating Income, Net Other Operating Income And Expense [Text Block] Other Nonoperating (Income) and Expenses, Net Other Nonoperating Income And Expense [Text Block] Organization policy. Organization Organization Policy [Text Block] Basis of Presentation Basis Of Accounting Policy Policy [Text Block] New Accounting Pronouncement New Accounting Pronouncements Policy Policy [Text Block] Consolidated Comprehensive Earnings/Loss and Accumulated Other Comprehensive Loss Comprehensive Income Policy Policy [Text Block] Earnings per Common Share Earnings Per Share Policy [Text Block] Restricted Cash Cash And Cash Equivalents Restricted Cash And Cash Equivalents Policy Policy elections. Policy Elections Policy Elections Policy [Text Block] Significant accounting policies. Significant accounting policies. Significant Accounting Policies [Table] Significant Accounting Policies [Table] Parent Significant Accounting Policies [Line Items] Significant Accounting Policies [Line Items] Comprehensive Earnings Schedule Of Comprehensive Income Loss Table [Text Block] Changes in Accumulated Other Comprehensive Loss Net of Tax Schedule Of Accumulated Other Comprehensive Income Loss Table [Text Block] Noncurrent deferred tax assets recorded in accumulated other comprehensive loss. Noncurrent Deferred Tax Assets Recorded In Accumulated Other Comprehensive Loss Noncurrent Deferred Tax Assets Recorded In Accumulated Other Comprehensive Loss Table [Text Block] Reclassification Out of Accumulated Other Comprehensive Loss Reclassification Out Of Accumulated Other Comprehensive Income Table [Text Block] Basic and Diluted Earnings Per Common Share Schedule Of Earnings Per Share Basic And Diluted Table [Text Block] Reconciliation of Cash, Cash Equivalents and Restricted Cash Schedule Of Cash And Cash Equivalents Table [Text Block] Schedule of revenue by category for reportable segment. Schedule of Company's Total Revenues by Category for each Reportable Segment Schedule Of Revenue By Category For Reportable Segment Table [Text Block] Summary of Information About the Company's Contract Balances Contract With Customer Asset And Liability Table [Text Block] Schedule of Inventories Net Schedule Of Inventory Current Table [Text Block] Long-Term Debt Schedule Of Debt Instruments [Text Block] Schedule of Components of Net Periodic Benefit Cost (Credit) Schedule Of Net Benefit Costs Table [Text Block] Financial Data for Continuing Operation for Company's Reportable Business Segments Schedule Of Segment Reporting Information By Segment [Text Block] Schedule of entity wide revenue and gross profit from external customers by products and services. Total Revenues and Gross Profit by Product Line Schedule Of Entity Wide Revenue And Gross Profit From External Customers By Products And Services [Text Block] Schedule Of Other Significant Noncash Transactions Schedule Of Other Significant Noncash Transactions [Text Block] Supplemental Disclosures of Cash Flow Information Schedule Of Cash Flow Supplemental Disclosures Table [Text Block] Number of quarries and yards. Number of states with aggregates business sales by destination. Subsequent Event Type Subsequent Event Type [Axis] Subsequent Event Type Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Number of quarries and yards Number Of Quarries And Yards Number of states with aggregates business sales by destination Number Of States With Aggregates Business Sales By Destination Reportable business segments Number Of Reportable Segments Statement Of Income And Comprehensive Income [Abstract] Net earnings attributable to Martin Marietta Other comprehensive earnings, net of tax Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent Accumulated Other Comprehensive Income Loss [Table] Accumulated Other Comprehensive Income Loss [Table] Pension and Postretirement Benefit Plans Accumulated Defined Benefit Plans Adjustment [Member] Foreign Currency Accumulated Translation Adjustment [Member] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income Loss [Line Items] Other comprehensive earnings (loss) before reclassifications, net of tax Other Comprehensive Income Loss Before Reclassifications Net Of Tax Amounts reclassified from accumulated other comprehensive earnings (loss), net of tax Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax Other comprehensive earnings (loss), net of tax Accumulated other comprehensive loss, noncurrent deferred tax assets, pension and postretirement benefit plans. Accumulated other comprehensive loss, noncurrent deferred tax assets, other comprehensive earnings, tax effect, pension and postretirement benefit plans. Equity [Abstract] Balance at beginning of period, Pension and Postretirement Benefit Plans Accumulated Other Comprehensive Loss Noncurrent Deferred Tax Assets Pension And Postretirement Benefit Plans Tax effect of other comprehensive earnings, Pension and Postretirement Benefit Plans Accumulated Other Comprehensive Loss Noncurrent Deferred Tax Assets Other Comprehensive Earnings Tax Effect Pension And Postretirement Benefit Plans Balance at end of period, Pension and Postretirement Benefit Plans Reclassification Out Of Accumulated Other Comprehensive Income [Table] Reclassification Out Of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income Reclassification Out Of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income Reclassification Out Of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income Reclassification Out Of Accumulated Other Comprehensive Income [Member] Income Statement Location Income Statement Location [Axis] Income Statement Location Income Statement Location [Domain] Other Nonoperating (Income) and Expense, Net Other Nonoperating Income Expense [Member] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] Prior service credit Other Comprehensive Income Loss Amortization Adjustment From A O C I Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax Actuarial loss Other Comprehensive Income Loss Reclassification Adjustment From A O C I Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax Total reclassifications out of accumulated other comprehensive loss before taxes Other Comprehensive Income Loss Reclassification Adjustment From A O C I Pension And Other Postretirement Benefit Plans Before Tax Additional interest expense Tax benefit Earnings from Continuing Operations Basic and diluted net income loss attributable to common shareholders of reporting entity. Less: Distributed and undistributed earnings attributable to unvested awards Participating Securities Distributed And Undistributed Earnings Loss Diluted Basic and diluted net earnings available to common shareholders attributable to Martin Marietta Basic And Diluted Net Income Loss Attributable To Common Shareholders Of Reporting Entity Basic weighted-average common shares outstanding Effect of dilutive employee and director awards Incremental Common Shares Attributable To Share Based Payment Arrangements Diluted weighted-average common shares outstanding Number of days Restricted from utilizing cash. Number of days restricted from utilizing cash Number Of Days Restricted From Utilizing Cash Restricted Cash And Cash Equivalents [Abstract] Total cash, cash equivalents and restricted cash presented in the consolidated statements of cash flows Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Performance obligation period. Product and freight revenues customer payment terms. Customer payment terms based on contractual billing. Revenue recognition. Revenue recognition. Revenue Recognition [Table] Revenue Recognition [Table] Statistical Measurement Range [Axis] Statistical Measurement Range [Member] Minimum Minimum [Member] Maximum Maximum [Member] Service Service [Member] Geographical Statement Geographical [Axis] Geographical Segment Geographical [Domain] COLORADO COLORADO Revenue Recognition [Line Items] Revenue Recognition [Line Items] Performance obligations, description of timing Revenue Performance Obligation Description Of Timing Performance obligations, period Performance Obligation Period Product and freight revenues customer payment terms Product And Freight Revenues Customer Payment Terms Customer payments terms based on contractual billing Customer Payment Terms Based On Contractual Billing Future revenues from unsatisfied performance obligations Revenue Remaining Performance Obligation Minimum Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Start Date [Axis] Performance obligations, customer satisfaction period Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 Consolidation Items Consolidation Items [Axis] Consolidation Items Consolidation Items [Domain] Operating Segments Operating Segments [Member] Segments Statement Business Segments [Axis] Segments Segment [Domain] Building materials business east group. Building Materials Business East Group Building Materials Business East Group [Member] Building materials business west group. Building Materials Business West Group Building Materials Business West Group [Member] Building materials business. Building Materials Business Building Materials Business [Member] Magnesia specialties. Magnesia Specialties Magnesia Specialties [Member] Total Service revenues Costs in excess of billings Contract With Customer Asset Net Billings in excess of costs Contract With Customer Liability Revenue recognized from contract liabilities Contract With Customer Liability Revenue Recognized Retainage on contracts Contract Receivable Retainage Business Combination, number of ready mixed concrete operations acquired. Business combination, number of ready mixed concrete operations acquired Business Combination Number Of Ready Mixed Concrete Operations Acquired Finished products Inventory Finished Goods Products in process Inventory Work In Process Raw materials Inventory Raw Materials Supplies and expendable parts Other Inventory Supplies Inventories, Gross Inventory Gross Less: Allowances Inventory Valuation Reserves Total Debt Instrument [Table] Debt Instrument [Table] Debt Instrument Debt Instrument [Axis] Debt Instrument, Name Debt Instrument Name [Domain] Four point two five percent senior notes due twenty twenty four. 4.25% Senior Notes, Due 2024 Four Point Two Five Percent Senior Notes Due Twenty Twenty Four [Member] Seven percent debentures due twenty twenty five. 7% Debentures, Due 2025 Seven Percent Debentures Due Twenty Twenty Five [Member] Three point four five zero percent senior notes due twenty twenty seven. 3.450% Senior Notes, Due 2027 Three Point Four Five Zero Percent Senior Notes Due Twenty Twenty Seven [Member] Three point five zero zero percent senior notes due twenty twenty seven. 3.500% Senior Notes, Due 2027 Three Point Five Zero Zero Percent Senior Notes Due Twenty Twenty Seven [Member] Two point five zero zero percent senior notes due twenty thirty. 2.500% Senior Notes, Due 2030 Two Point Five Zero Zero Percent Senior Notes Due Twenty Thirty [Member] Six point two five percentage of senior notes due two thousand thirty seven. 6.25% Senior Notes, Due 2037 Six Point Two Five Percentage Of Senior Notes Due Two Thousand Thirty Seven [Member] Four point two five zero percent senior notes due twenty fourty seven. 4.250% Senior Notes, Due 2047 Four Point Two Five Zero Percent Senior Notes Due Twenty Fourty Seven [Member] Floating rate senior notes due twenty twenty. Floating Rate Senior Notes, Due 2020 Floating Rate Senior Notes Due Twenty Twenty [Member] Trade receivable credit facility. Trade Receivable Facility Trade Receivable Credit Facility [Member] Other notes. Other Notes Other Notes [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Total debt Long Term Debt Less: Current maturities of long-term debt and short-term facilities Debt instrument maturity date year. Three point four five percent senior notes due twenty twenty seven. 3.450% Senior Notes, Due 2027 Three Point Four Five Percent Senior Notes Due Twenty Twenty Seven [Member] Maturity year Debt Instrument Maturity Date Year Interest rate on notes Debt Instrument Interest Rate Stated Percentage Interest rate Debt Instrument Interest Rate Effective Percentage Credit Facility interest rate Line Of Credit Facility Interest Rate At Period End Debt instrument payable upon maturity. Variable Rate Variable Rate [Axis] Variable Rate Variable Rate [Domain] US Treasury (UST) Interest Rate Us Treasury Ust Interest Rate [Member] London Interbank Offered Rate(LIBOR) London Interbank Offered Rate L I B O R [Member] conduit lenders. Conduit Lenders Conduit Lenders [Member] Credit Facility Credit Facility [Axis] Credit Facility Credit Facility [Domain] Revolving Facility Revolving Credit Facility [Member] Long-term Debt, Type Longterm Debt Type [Axis] Long-term Debt, Type Longterm Debt Type [Domain] Including acquisition bridge debt. Including Acquisition Bridge Debt Including Acquisition Bridge Debt [Member] Excluding acquisition bridge debt. Excluding Acquisition Bridge Debt Excluding Acquisition Bridge Debt [Member] Maximum Aggregate principal amount of long term debt Debt Instrument Face Amount Basis spread on variable rate Debt Instrument Basis Spread On Variable Rate1 Debt instrument redemption price percentage Debt Instrument Redemption Price Percentage Debt Instrument Payable Upon Maturity Debt Instrument Payable Upon Maturity Credit facility commitment Line Of Credit Facility Maximum Borrowing Capacity Debt instrument maturity period Line Of Credit Facility Expiration Date1 Credit facility outstanding Line Of Credit Maximum consolidated debt reduction for unrestricted cash and cash equivalents for debt covenant calculation. The amount by which consolidated debt, for purposes of calculating the debt covenant ratio, may be reduced for unrestricted cash and cash equivalents, provided no amounts are outstanding under the revolving credit facility and the AR credit facility. Ratio of consolidated net debt to earnings before interest taxes depreciation depletion and amortization. Senior unsecured revolving facility, maturity period Line Of Credit Facility Expiration Period Debt covenant Ratio Of Consolidated Net Debt To Earnings Before Interest Taxes Depreciation Depletion And Amortization Maximum consolidated debt reduction for unrestricted cash and cash equivalents for debt covenant calculation Maximum Consolidated Debt Reduction For Unrestricted Cash And Cash Equivalents For Debt Covenant Calculation Reduction of consolidated debt in the debt ratio calculation Consolidated Debt Reduction For Unrestricted Cash And Cash Equivalents For Debt Covenant Calculation Revolving facility, borrowings outstanding Line Of Credit Facility Fair Value Of Amount Outstanding Outstanding letters of credit Letters Of Credit Outstanding Amount Number of customer. Fair Value Disclosures [Abstract] Concentration Risk Type Concentration Risk By Type [Axis] Concentration Risk Type Concentration Risk Type [Domain] Customer Concentration Risk Customer Concentration Risk [Member] Concentration Risk Benchmark Concentration Risk By Benchmark [Axis] Concentration Risk Benchmark Concentration Risk Benchmark [Domain] Total Revenues Sales Revenue Net [Member] Percentage of concentration risk Concentration Risk Percentage1 Number of customer accounted for 10% or more of consolidated total revenues Number Of Customer Long-term debt, carrying values Long-term debt, fair values Long Term Debt Fair Value Effective income tax rate reconciliation change in reclassification from partnership to corporation. Effective income tax percentage reconciliation change in reclassification from partnership to corporation. Effective change in income tax rate Effective Income Tax Percentage Reconciliation Change In Reclassification From Partnership To Corporation Discrete benefit from change in tax status of subsidiary from partnership to corporation Effective Income Tax Rate Reconciliation Change In Reclassification From Partnership To Corporation Schedule Of Defined Benefit Plans Disclosures [Table] Schedule Of Defined Benefit Plans Disclosures [Table] Retirement Plan Type Retirement Plan Type [Axis] Retirement Plan Type Retirement Plan Type [Domain] Pension Pension Plans Defined Benefit [Member] Postretirement Benefits Other Postretirement Benefit Plans Defined Benefit [Member] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Service cost Defined Benefit Plan Service Cost Interest cost Defined Benefit Plan Interest Cost Expected return on assets Defined Benefit Plan Expected Return On Plan Assets Prior service cost (credit) Defined Benefit Plan Amortization Of Prior Service Cost Credit Actuarial loss (gain) Defined Benefit Plan Amortization Of Gains Losses Net periodic benefit cost (credit) Defined Benefit Plan Net Periodic Benefit Cost Retirement Plan Tax Status Retirement Plan Tax Status [Axis] Retirement Plan Tax Status Retirement Plan Tax Status [Domain] Qualified Pension Plan Qualified Plan [Member] Nonqualified Pension Plan Nonqualified Plan [Member] Retirement Plan Funding Status Retirement Plan Funding Status [Axis] Retirement Plan Funding Status Retirement Plan Funding Status [Domain] Underfunded Pension Plan Underfunded Plan [Member] Scenario Statement Scenario [Axis] Scenario Scenario Unspecified [Domain] Forecast Scenario Forecast [Member] Contribution made to qualified pension plans Defined Contribution Plan Employer Discretionary Contribution Amount Estimated contribution to pension plans, remainder of financal year Defined Benefit Plan Expected Future Employer Contributions Remainder Of Fiscal Year Estimated contribution to pension plans Defined Benefit Plan Expected Future Employer Contributions Current Fiscal Year Affiliate line of credit facility maturity period. Guarantee obligations outstanding. Commitments and contingencies. Commitments and contingencies. Commitments And Contingencies [Table] Commitments And Contingencies [Table] Guarantor Obligations, Nature Guarantee Obligations By Nature [Axis] Guarantor Obligations, Nature Guarantee Obligations Nature [Domain] Revolving line of credit expires in august two thousand fifteen. Revolving Line Of Credit Expires In August 2015 Revolving Line Of Credit Expires In August Two Thousand Fifteen [Member] Interest-only loan. Interest-only loan Interest Only Loan [Member] Commitments and Contingencies [Line Items] Commitments And Contingencies [Line Items] Guarantee of affiliate's obligations Guarantee Obligations Maximum Exposure Due from affiliate Guarantee Obligations Outstanding Line of credit maturity period Affiliate Line Of Credit Facility Maturity Period Due from affiliate Due From Affiliates Maturity date Debt Instrument Maturity Date Reportable segments Schedule Of Segment Reporting Information By Segment [Table] Schedule Of Segment Reporting Information By Segment [Table] Corporate Corporate Non Segment [Member] Building Materials Business West Group Building Materials Business Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Total revenues Earnings (Loss) from operations Property, Plant and Equipment, Type Property Plant And Equipment By Type [Axis] Property, Plant and Equipment, Type Property Plant And Equipment Type [Domain] Land Land [Member] Gains on sales of investment land Assets employed Schedule Of Product Information [Table] Schedule Of Product Information [Table] Aggregates. Aggregates Aggregates [Member] Cement. Cement Cement [Member] Ready mixed concrete. Ready Mixed Concrete Ready Mixed Concrete [Member] Asphalt and paving. Asphalt and Paving Asphalt And Paving [Member] Subsegments Consolidation Items Subsegments Consolidation Items [Axis] Subsegments Consolidation Items Subsegments Consolidation Items [Domain] Reportable Subsegments Reportable Subsegments [Member] Interproduct Revenues Intersubsegment Eliminations [Member] Subsegments Subsegments [Axis] Subsegments Subsegments [Domain] Product Information [Line Items] Product Information [Line Items] Gross profit (loss) Remeasurement of operating leases right of use assets. Noncash or part noncash acquisition, properties acquired, through asset swap. Accrued liabilities for purchases of property, plant and equipment Capital Expenditures Incurred But Not Yet Paid Right-of-use assets obtained in exchange for new operating lease liabilities Right Of Use Asset Obtained In Exchange For Operating Lease Liability Right-of-use assets obtained in exchange for new finance lease liabilities Right Of Use Asset Obtained In Exchange For Finance Lease Liability Remeasurement of operating lease right-of-use assets Remeasurement Of Operating Leases Right Of Use Assets Acquisition of assets through swap Noncash Or Part Noncash Acquisition Properties Acquired Through Asset Swap Cash paid for interest Interest Paid Net Cash paid for income taxes Income Taxes Paid Net Repayment of loans related to life insurance policies Payments For Proceeds From Policy Loans Component of other operating income and expense. Other operating income and expense. Other Operating Income And Expense [Table] Other Operating Income And Expense [Table] Austin, Texas and Riverside, California. Austin, Texas and Riverside, California Austin Texas And Riverside California [Member] Component of Other Operating Income and Expense [Line Items] Component Of Other Operating Income And Expense [Line Items] Gains on sales of investment land Pretax cash proceeds Proceeds From Sale Of Property Plant And Equipment Reversal of accruals for sales tax and unclaimed property contingencies Tax Adjustments Settlements And Unusual Provisions Third-party railroad track maintenance expense. Out of period expense. Out of period expense net of tax. Component of other income and expense. Component Of Other Income And Expense [Line Items] Component Of Other Income And Expense [Line Items] Third-party railroad track maintenance expense Third Party Railroad Track Maintenance Expense Reduction in pension expense Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component Out of period expense Out Of Period Expense Out of period expense net of tax Out Of Period Expense Net Of Tax