Accounting Policies [Abstract] Accounting Policies [Abstract] Accounting standards update two thousand fifteen zero three. Accounting Standards Update Two Thousand Fifteen Zero Three [Member] Accounting Standards Update (ASU) 2015-03 [Member] Accounts Payable and Accrued Liabilities Disclosure [Text Block] Accrued Expenses Accounts Payable, Current Accounts payable Accounts Receivable, Gross, Current Accounts receivable Accounts Receivable, Net, Current Accounts receivable, net Accounts receivable, net Accounts Receivable, Related Parties Receivables from related parties Accounts Receivable, Related Parties, Current Accounts receivables due from related parties Accounts Receivable, Unapproved Contract Claims Unapproved change orders within accounts receivable Accretion or redemption value adjustment. Accretion Or Redemption Value Adjustment Accretion/ redemption value adjustment Accrual for Taxes Other than Income Taxes, Current Non-income taxes Accrued Employee Benefits, Current Payroll and benefits Accrued Insurance, Current Insurance Accrued Liabilities and Other Liabilities Current portion of liabilities Accrued Liabilities, Current Accrued expenses Total Accrued Liabilities, Current [Abstract] Accrued Liabilities, Current [Abstract] Accrued mining and landfill reclamation. Accrued Mining And Landfill Reclamation [Text Block] Accrued Mining and Landfill Reclamation Accrued Professional Fees, Current Professional fees Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Less accumulated depreciation, depletion and amortization Property, plant and equipment, accumulated depreciation, depletion and amortization Less accumulated depreciation, depletion and amortization AOCI Including Portion Attributable to Noncontrolling Interest, before Tax Ending Balance Beginning Balance Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax Total amount recognized Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] AOCI Attributable to Parent [Member] Accumulated Other Comprehensive Loss (AOCI) [Member] Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Foreign Currency Translation Adjustments [Member] Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Acquired intangible assets weighted average life The amount of consideration for a business acquisition due in the current period. Acquisition Related Liabilities Current Current portion of acquisition-related liabilities The amount of consideration for a business acquisition that is not due in the next twelve months. Acquisition Related Liabilities Non Current Acquisition-related liabilities Additional Paid in Capital Additional paid in capital Additional Paid-in Capital [Member] Additional Paid-in Capital [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net loss to net cash used in operating activities: Affiliate Costs Costs incurred in connection with several transactions with unconsolidated affiliates Aggregates. Aggregates [Member] Aggregates [Member] Agreement Date Agreement Date Agreement date Agreement Termination Date Agreement Termination Date Management fee agreement termination date Alleyton Southwest Ready Mix [Member] Alleyton Southwest Ready Mix [Member] Alleyton, Southwest Ready Mix [Member] Allocated Share-based Compensation Expense Share-based compensation expense Allowance for Doubtful Accounts Receivable, Current Less: Allowance for doubtful accounts Amendment Flag Amendment Flag Amortization of Financing Costs Net interest expense Amortization Amortization of Intangible Assets Amortization expense Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Number of antidilutive shares excluded from computation of earnings per share Asphalt. Asphalt [Member] Asphalt [Member] Asset Impairment Charges Impairment charges Impairment charges recognized Asset Retirement Obligation Ending balance Beginning balance Asset Retirement Obligation [Abstract] Asset Retirement Obligation [Abstract] Asset Retirement Obligation, Accretion Expense Accretion expense Asset retirement obligation additional liabilities incurred. Asset Retirement Obligation Additional Liabilities Incurred Additional liabilities incurred Asset Retirement Obligation Disclosure [Abstract] Asset Retirement Obligation Disclosure [Abstract] Asset Retirement Obligation Disclosure [Text Block] Accrued Mining and Landfill Reclamation Asset Retirement Obligation, Liabilities Incurred Acquired obligations Asset Retirement Obligation, Liabilities Settled Settlement of reclamation obligations Asset Retirement Obligation, Revision of Estimate Change in cost estimate Assets Total assets Total assets Assets [Abstract] Assets Assets, Current Total current assets Assets, Current [Abstract] Current assets: Assets Held under Capital Leases [Member] Capital Leases for Equipment and Building [Member] Award Type [Axis] Award Type [Axis] Base Rate [Member] Base Rate [Member] Basis of Accounting, Policy [Policy Text Block] Basis of Presentation Billings in Excess of Cost, Current Billings in excess of costs and estimated earnings Blackstone And Affiliates [Member] Blackstone And Affiliates [Member] Blackstone And Affiliates [Member] Blackstone Management Partners. Blackstone Management Partners [Member] Blackstone Management Partners L.L.C. [Member] Building Improvements [Member] Buildings and Improvements [Member] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Effective Date of Acquisition Business acquisition date Business Acquisition, Integration, Restructuring and Other Related Costs [Text Block] Acquisition-Related Liabilities Business Acquisition [Line Items] Business Acquisition [Line Items] Business Acquisition, Pro Forma Information [Table Text Block] Schedule of Supplemental Pro Forma Information of Acquisitions Business Acquisition, Pro Forma Net Income (Loss) Net income (loss) Net income from the acquisition Business Acquisition, Pro Forma Revenue Proforma effect on revenue Revenue Business Acquisition [Table] Business Acquisition [Table] Business Acquisition [Table] Business Combination, Acquisition Related Costs Transaction costs Business Combination, Consideration Transferred, Liabilities Incurred Acquisition related liabilities Business Combination, Consideration Transferred, Other Other Business Combination, Contingent Consideration, Liability, Current Current portion of contingent consideration Business Combination, Contingent Consideration, Liability, Noncurrent Contingent consideration Business Combination Disclosure [Text Block] Acquisitions Business Combination Increase Decrease To Reflect Liabilities Acquired At Fair Value [Abstract] Business Combination Increase Decrease To Reflect Liabilities Acquired At Fair Value [Abstract] Business Combination Increase Decrease To Reflect Liabilities Acquired At Fair Value [Abstract] Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Assets Financial assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Liabilities Financial liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory Inventories Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Net assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other Other long-term liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Other assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Property, plant and equipment Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Purchase price Business Combinations [Abstract] Business Combinations [Abstract] Business Description and Accounting Policies [Text Block] Summary of Organization and Significant Accounting Policies CANADA CANADA Capital Lease Obligations, Current Capital lease obligations Capital Lease Obligations, Noncurrent Capital leases, accrued expenses obligations Capital Leases, Future Minimum Payments Receivable, Next Twelve Months Future minimum rental commitments year one Capital Leases, Future Minimum Payments, Receivable in Five Years Future minimum rental commitments year five Capital Leases, Future Minimum Payments, Receivable in Four Years Future minimum rental commitments year four Capital Leases, Future Minimum Payments, Receivable in Three Years Future minimum rental commitments year three Capital Leases, Future Minimum Payments, Receivable in Two Years Future minimum rental commitments year two Capital Unit, Class A [Member] Class A Units [Member] Capital Unit, Class B [Member] Class B Units [Member] Capital Unit Class C- [Member] Capital Unit Class C- [Member] Class C Units [Member] Capital unit class d. Capital Unit Class D [Member] Class D Units [Member] Capital Unit, Class [Domain] Capital Unit, Class [Domain] Capital Units by Class [Axis] Capital Units by Class [Axis] Capital Units [Member] Capital Units [Member] Cash Cash - end of period Cash - Beginning of period Cash Cash and Cash Equivalents, Period Increase (Decrease) Net increase in cash Cash Flow, Supplemental Disclosures [Text Block] Supplemental Cash Flow Information Cash [Member] Cash [Member] Cash Payments [Abstract] Cash Payments [Abstract] Cash payments: Cement. Cement [Member] Cement [Member] Central. Central [Member] Central Region [Member] Change in retirement plans. Change In Retirement Plans [Member] Change In Retirement Plans [Member] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Classification [Domain] Class of Stock Disclosures [Abstract] Class D Units Class of Stock [Domain] Class of Stock [Domain] COLOMBIA COLOMBIA Colorado County S And G [Member] Colorado Countys Andg [Member] Colorado County S&G [Member] Commitments and Contingencies Commitments and contingencies Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Common Class A [Member] Common Class A [Member] Common Class B [Member] Common Class B [Member] Common Stock, Par or Stated Value Per Share Common stock, par value Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Issued Common stock, shares issued Common Stock, Shares, Outstanding Common stock, shares outstanding Common Stock, Value, Issued Common stock Common Unit, Authorized Capital Units, Authorized Common Unit, Issued Capital Units, Issued Class B capital units purchased Common Unit, Outstanding Ending Balance (Units) Beginning Balance (Units) Capital Units, Outstanding Compensation and Employee Benefit Plans [Text Block] Employee Benefit Plans Compensation and Retirement Disclosure [Abstract] Compensation and Retirement Disclosure [Abstract] Components of Deferred Tax Liabilities [Abstract] Deferred tax (liabilities) assets: Components of Income Tax Expense (Benefit), Continuing Operations [Abstract] Provision for income taxes: Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive loss attributable to parent Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Less comprehensive income attributable to the noncontrolling interest Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive loss Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk, Credit Risk, Policy [Policy Text Block] Business and Credit Concentrations Concentration Risk, Percentage Customer accounted revenue Concentration Risk Type [Domain] Concentration Risk Type [Domain] Condensed Income Statement [Table] Condensed Income Statement [Table] Consideration Of Consolidated Profit Consideration Of Consolidated Profit Consideration of Consolidated profit Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Net Recording of noncontrolling interest upon reorganization Consolidation, Policy [Policy Text Block] Principles of Consolidation Construction in Progress [Member] Construction in Progress [Member] Continental Cement Company L.L.C. Continental Cement Company Llc [Member] Continental Cement Company, L.L.C. [Member] Contingent consideration fair value adjustment. Contingent Consideration Fair Value Adjustment Reductions recognized in contingent consideration Contractors [Abstract] Contractors [Abstract] Contractual Obligation, Fiscal Year Maturity Schedule [Table Text Block] Minimum Contractual Commitments under Long-Term Operating Leases Corporate, Non-Segment [Member] Corporate and Other [Member] Cost of Goods and Services Sold Net cost of revenue Cost of Goods and Services Sold [Abstract] Cost of revenue (excluding items shown separately below): Cost of Goods Sold Product Cost of Revenue Total cost of revenue Cost of Services Service Costs in Excess of Billings, Current Costs and estimated earnings in excess of billings Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Current Income Tax Expense (Benefit) Current Customer Concentration Risk [Member] Customer Concentration Risk [Member] Davenport Acquisition [Member] Davenport Acquisition [Member] Davenport Acquisition [Member] Debt, Current Current portion of debt Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Disclosure [Text Block] Debt Debt Instrument Amortized Discount (Premium) Debt Instrument Amortized Discount (Premium) Original issuance discount Debt Instrument, Basis Spread on Variable Rate Basis spread on variable rate Long-term Debt, Gross Total Debt Instrument, Face Amount Debt instrument, face amount Long-term debt, face value Debt Instrument Fair Value Carrying Value [Abstract] Debt Instrument Fair Value Carrying Value [Abstract] Debt Instrument Fair Value Carrying Value [Abstract] Debt Instrument, Frequency of Periodic Payment Frequency of periodic payment Debt Instrument, Increase (Decrease), Net Decrease in long-term debt Debt Instrument, Interest Rate, Effective Percentage Effective interest rate Debt Instrument, Interest Rate, Increase (Decrease) Change in interest rate Debt Instrument, Interest Rate, Stated Percentage Interest rate Senior notes, interest rate Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum Interest rate - Revolving credit commitments, minimum interest rate Debt Instrument [Line Items] Debt Instrument [Line Items] Debt Instrument, Maturity Date Maturity date Debt Instrument Quarterly Principal Repayment Percentage Debt Instrument Quarterly Principal Repayment Percentage Quarterly principal repayments percentage Debt instrument redemption period date. Debt Instrument Redemption Period Date Anticipated redemption date of the instrument Debt Instrument, Redemption Period, End Date Redemption date of the debt instrument Senior notes, redemption date Debt Instrument Redemption Premium Debt Instrument Redemption Premium Debt Instrument, redemption premium Debt Instrument, Redemption Price, Percentage Senior notes, redemption price percentage Debt Instrument, Repurchased Face Amount Senior notes, aggregate principal amount redeemed Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Debt Instrument, Unamortized Discount Original issuance discount Debt Instrument, Unamortized Premium Plus: Original issue net premium Premium of debt instrument Deferred Consideration Deferred Consideration Fair value of deferred consideration