Proceeds from disposition of business Proceeds from Divestiture of Businesses Current assets acquired Business Combination, Recognized Asset Acquired, Asset, Current Unrealized losses on investments Unrealized Gain (Loss) on Investments Less accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Statistical Measurement [Domain] Statistical Measurement [Domain] Property, plant, and equipment acquired Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment Current liabilities acquired Business Combination, Recognized Liability Assumed, Liability, Current Award Timing Predetermined Award Timing Predetermined [Flag] Weighted Average Interest Rate at March 31, 2026 Long-Term Debt, Weighted Average Interest Rate, at Point in Time Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Letters of credit set to expire, year two Letters of Credit Set to Expire, Year Two Letters of Credit Set to Expire, Year Two Entity File Number Entity File Number Other Paid-in Capital Additional Paid-in Capital [Member] Montana Ready-Mix Concrete Business Montana Ready-Mix Concrete Business [Member] Montana Ready-Mix Concrete Business Contract with customer, performance obligation satisfied in previous period Contract with Customer, Performance Obligation Satisfied in Previous Period Tabular List, Table Tabular List [Table Text Block] Aggregates Aggregates [Member] Aggregates New accounting standards New Accounting Pronouncements, Policy [Policy Text Block] Schedule of Fair Value of Long-Term Debt Fair Value, by Balance Sheet Grouping [Table Text Block] Contract assets Contract assets Contract with Customer, Asset, after Allowance for Credit Loss, Current Interest expense, net Interest Income (Expense), Nonoperating Guarantor obligations, maximum exposure, undiscounted Guarantor Obligations, Maximum Exposure, Undiscounted Receivables past due 90 days Accounts Receivable, Noncurrent, 90 Days or More Past Due, Still Accruing Goodwill [Line Items] Goodwill [Line Items] Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Other corporate expenses Other Expenses Number of reportable segments aligned with product line Number Of Reportable Segments Aligned With Product Line Number Of Reportable Segments Aligned With Product Line Measurement Basis [Axis] Measurement Basis [Axis] Basic (in dollars per share) Net loss per share - basic (in dollars per share) Earnings Per Share, Basic Adjustment to Compensation: Adjustment to Compensation [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Revenue from Contracts with Customers Revenue from Contract with Customer [Text Block] Accounts payable Increase (Decrease) in Accounts Payable, Trade Other comprehensive income Other Comprehensive Income (Loss), Net of Tax Schedule of Segment Reporting Information, by Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Supplies and parts Other Inventory, Supplies, Gross Schedule of Cash and Cash Equivalents Schedule of Cash and Cash Equivalents [Table Text Block] Remaining performance obligations Revenue, Remaining Performance Obligation, Amount Pension and postretirement benefit plan contributions Payment for Pension and Other Postretirement Benefits Adjustment to Compensation, Amount Adjustment to Compensation Amount Principles of consolidation Consolidation, Policy [Policy Text Block] Employee stock-based compensation costs Share-Based Payment Arrangement, Noncash Expense Employee Stock Option Share-Based Payment Arrangement, Option [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Net proceeds from sale or disposition of property and other Proceeds from Sale of Productive Assets Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Accounts and Financing Receivables [Table] Total stockholders' equity Beginning balance Ending balance Equity, Attributable to Parent Fair value by measurement frequency [Axis] Measurement Frequency [Axis] Insider Trading Policies and Procedures [Line Items] Common stock, authorized (in shares) Common Stock, Shares Authorized Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Current assets: Assets, Current [Abstract] Total liabilities and stockholders' equity  Liabilities and Equity Liquid asphalt Liquid Asphalt [Member] Liquid Asphalt Other current liabilities Increase (Decrease) in Other Current Liabilities Fair value, measurements, recurring Fair Value, Recurring [Member] Reclassification, Type [Domain] Reclassification, Type [Domain] Liabilities and Stockholders' Equity Liabilities and Equity [Abstract] Cover [Abstract] Cover [Abstract] Portion at fair value measurement Portion at Fair Value Measurement [Member] Maximum Maximum [Member] Capital expenditures Segment, Expenditure, Addition to Long-Lived Assets Accounting Policies [Abstract] Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Long-term debt outstanding [Line Items] Debt Instrument [Line Items] Mountain Mountain Segment [Member] This segment mines, processes and sells construction aggregates. It also produces and sells asphalt and ready-mix concrete. In addition this segment preforms integrated contracting services. This segment operates in Idaho, Montana and Wyoming. Treasury Stock Treasury Stock, Common [Member] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Pay vs Performance Disclosure [Line Items] Initial accounting incomplete, adjustment, intangibles Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Gain on bargain purchase Business Combination, Bargain Purchase, Gain Recognized, Amount Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Loss before income taxes Consolidated loss before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Other Other Liabilities, Noncurrent Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Operating Segments Operating Segments [Member] Schedule of Cash Flow Information Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Long-term debt - current portion Less current maturities Long-Term Debt, Current Maturities Company Selected Measure Amount Company Selected Measure Amount Postretirement liability adjustment: Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax [Abstract] Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Revenue, Description Of Timing [Axis] Revenue, Description Of Timing [Axis] Revenue, Description Of Timing Central Central Central Segment [Member] This segment mines, processes and sells construction aggregates. It also produces and sells asphalt and ready-mix concrete. This segment also manufactures prestressed concrete products. In addition this segment preforms integrated contracting services. This segment operates in Iowa, Minnesota, North Dakota and South Dakota. Comprehensive loss attributable to common stockholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent Disposal Group Name [Domain] Disposal Group Name [Domain] Name Measure Name Letter of Credit Letter of Credit [Member] Current operating lease liabilities Operating Lease, Liability, Current Deferred income taxes Deferred Income Tax Liabilities, Net Document Fiscal Period Focus Document Fiscal Period Focus Award Timing Method Award Timing Method [Text Block] Award Type Award Type [Axis] Total long-term debt Long-Term Debt Change in contract liabilities Contract with Customer, Liability, Current Change Amount of increase (decrease) in current contract liabilities Total assets Assets Assets Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] 2027 Finite-Lived Intangible Asset, Expected Amortization, Year One Trading Symbol Trading Symbol Cash, cash equivalents and restricted cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Entity Address, City or Town Entity Address, City or Town Operating activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Receivable Type [Axis] Receivable Type [Axis] Other segment items Segment Reporting, Other Segment Item, Amount Corporate, Non-Segment & Intersegment Eliminations Corporate, Non-Segment & Intersegment Eliminations [Member] Corporate, Non-Segment & Intersegment Eliminations Uncompleted Contracts Uncompleted Contracts [Text Block] Uncompleted contracts Inventories Inventory Disclosure [Text Block] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Expected credit loss Credit Loss, Financial Instrument [Policy Text Block] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Business combination, consideration transferred Business Combination, Consideration Transferred 2030 Finite-Lived Intangible Asset, Expected Amortization, Year Four Backlog Order or Production Backlog [Member] Receivables and Allowance for Expected Credit Losses Credit Loss, Financial Instrument [Text Block] Entity Emerging Growth Company Entity Emerging Growth Company 2029 Long-Term Debt, Maturity, Year Three Entity common stock, shares outstanding Entity Common Stock, Shares Outstanding Right-of-use assets obtained in exchange for new operating lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Contract receivables Billed Contracts Receivable Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Less unamortized debt issuance costs Debt Issuance Costs, Net Significant Other Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Business Combination [Domain] Business Combination [Domain] Common stock, outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Provision for credit losses Current expected credit loss provision Accounts Receivable, Credit Loss Expense (Reversal) PEO PEO [Member] Letters of credit set to expire in next fiscal year Letters of Credit Set to Expire in Next Fiscal Year Letters of credit set to expire in next fiscal year. Schedule of Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Revenue, Description Of Timing, 25 Months Or More Revenue, Description Of Timing, 25 Months Or More [Member] Revenue, Description Of Timing, 25 Months Or More Changes in current assets and liabilities, net of acquisitions: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Amount outstanding under guarantees that is reflected on balance sheet Guarantor Obligations, Current Carrying Value Schedule of Estimated Amortization Expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Retained Earnings Retained Earnings [Member] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Cash, cash equivalents and restricted cash Cash, cash equivalents and restricted cash -- beginning of year Cash, cash equivalents and restricted cash -- end of period Cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Income Statement [Abstract] Income tax benefit Income Tax Expense (Benefit) Other assets Other Assets Other taxes payable Taxes Payable, Current Other intangible assets, net Total Intangible Assets, Net (Excluding Goodwill) Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Product and Service [Domain] Product and Service [Domain] Fair value, hierarchy [Axis] Fair Value Hierarchy and NAV [Axis] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Business Combination [Table] Business Combination [Table] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Other current assets Increase (Decrease) in Other Current Assets Other Notes Notes Payable, Other Payables [Member] Background Restructuring and Related Activities Disclosure [Text Block] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Goodwill Acquired During the Year Goodwill, Acquired During Period City Area Code City Area Code Acquisitions and Dispositions Mergers, Acquisitions and Dispositions Disclosures [Text Block] Acquisitions, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Commitments and contingencies Commitments and Contingencies, Policy [Policy Text Block] Commitments and contingencies Commitments and Contingencies Disclosure [Abstract] Schedule of Changes in Contract Assets and Liabilities Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Net cash used in operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Goodwill Goodwill Goodwill, beginning balance Goodwill, ending balance Goodwill Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Remainder of 2026 Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year Equity Components [Axis] Equity Components [Axis] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Trade Accounts Receivable Trade Accounts Receivable [Member] Construction materials Product [Member] Number of reportable segments Number of Reportable Segments Ready-mix concrete Ready-mix concrete [Member] Ready-mix concrete Supplemental Cash Flow Information [Abstract] Supplemental Cash Flow Information [Abstract] Other Performance Measure, Amount Other Performance Measure, Amount Schedule of Restrictions on Cash and Cash Equivalents Restrictions on Cash and Cash Equivalents [Table Text Block] Debt issuance costs Payments of Debt Issuance Costs Entity Address, State or Province Entity Address, State or Province Total current liabilities  Liabilities, Current Decrease in cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and 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for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Interest paid, net Interest Paid, Excluding Capitalized Interest, Operating Activity Document Fiscal Year Focus Document Fiscal Year Focus Basis of presentation Basis of Accounting, Policy [Policy Text Block] Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Repayment of long-term debt Repayments of Long-Term Debt Entity Interactive Data Current Entity Interactive Data Current Carrying amount Reported Value Measurement [Member] Acquisition related costs Business Combination, Acquisition-Related Cost, Expense Equity [Abstract] Equity [Abstract] Business Segment Data Segment Reporting Disclosure [Text Block] Schedule of Goodwill [Table] Goodwill [Table] Operating Segments Excluding Intersegment Elimination Operating Segments Excluding Intersegment Elimination [Member] Operating Segments Excluding Intersegment Elimination Fair value measurements [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Other noncurrent liabilities acquired Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent Pension and postretirement benefit plan net periodic benefit cost Pension and Other Postretirement Benefits Expense (Reversal of Expense), Noncash Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Accumulated other comprehensive loss Comprehensive Income (Loss) Note [Text Block] Fair value, assets and liabilities measured on recurring and nonrecurring basis [Table] Fair Value, Recurring and Nonrecurring [Table] Amortization of intangible assets Amortization of Intangible Assets Selling, general and administrative expenses Selling, general and administrative expenses excluding depreciation, depletion and amortization Selling, General and Administrative Expense Capital expenditures Payments to Acquire Productive Assets Depreciation, depletion and amortization Depreciation, depletion and amortization Depreciation, Depletion and Amortization Investments and other Other Assets, Noncurrent Letters of credit set to expire current year Letters of Credit Set to Expire Current Year Letters of credit set to expire current year. Accrued interest Interest Payable, Current Entity Central Index Key Entity Central Index Key Receivables Increase (Decrease) in Accounts and Notes Receivable PEO Name PEO Name Schedule of Debt Maturities Schedule of Maturities of Long-Term Debt [Table Text Block] Revenue Revenues Revenues Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Fair value, balance sheet grouping [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Finished products Inventory, Finished Goods, Gross Corporate Services and Eliminations Corporate Services, Segment [Member] Corporate Services, Segment Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Arrangement Duration Trading Arrangement Duration Investments Payments for (Proceeds from) Investments Contract liabilities Contract liabilities Contract with Customer, Liability, Current Segments [Axis] Segments [Axis] 2025 Aggregate Acquisitions 2025 Aggregate Acquisitions [Member] 2025 Aggregate Acquisitions Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Local Phone Number Local Phone Number Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Thereafter Long-Term Debt, Maturity, after Year Five Strata Corporation Strata Corporation [Member] Strata Corporation Assets Assets [Abstract] 2026 Aggregate Acquisitions 2026 Aggregate Acquisitions [Member] 2026 Aggregate Acquisitions Long-term debt Net long-term debt Long-Term Debt, Excluding Current Maturities Credit Facility [Axis] Credit Facility [Axis] Underlying Security Market Price Change Underlying Security Market Price Change, Percent 2029 Finite-Lived Intangible Asset, Expected Amortization, Year Three Debt Instrument [Axis] Debt Instrument [Axis] Fair Value Measurements Fair Value Disclosures [Text Block] Business Combination [Line Items] Business Combination [Line Items] Credit Facility [Domain] Credit Facility [Domain] Intangible assets, gross Finite-Lived Intangible Assets, Gross Stockholders' equity: Equity, Attributable to Parent [Abstract] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Number of states in which entity operates Number of States in which Entity Operates Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Change in contract assets Contract with Customer, Asset, Net Current Change Amount of increase (decrease) in current contract assets, net Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Noncurrent operating lease liabilities Operating Lease, Liability, Noncurrent Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] Contracting services public-sector Contracting services public-sector [Member] Contracting services public-sector Montana Aggregate-Based Operations Montana Aggregate-Based Operations [Member] Montana Aggregate-Based Operations Stock-based compensation expense APIC, Share-Based Payment Arrangement, Recognition and Exercise Fair Value as of Grant Date Award Grant Date Fair Value Receivables, net Accounts Receivable, after Allowance for Credit Loss Entity Registrant Name Entity Registrant Name Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Schedule of Long-Term Debt Outstanding Schedule of Long-Term Debt Instruments [Table Text Block] Document Quarterly Report Document Quarterly Report Total assets measured at fair value Assets, Fair Value Disclosure Long-term debt, fair value Long-Term Debt, Fair Value Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Equity in (losses) earnings of unconsolidated affiliates Equity In Results Of Operations From Unconsolidated Affiliates Equity In Results Of Operations From Unconsolidated Affiliates Number of operating segments Number of Operating Segments Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Net contract assets Contract with Customer, Assets and Liabilities, Current, Net Total of net contract assets and liabilities Contracting services Service [Member] Schedule of Other Amortizable Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Restatement Determination Date: Restatement Determination Date [Axis] Non-PEO NEO Non-PEO NEO [Member] Outstanding letters of credit Letters of Credit Outstanding, Amount Segment Reporting, Revenue Reconciling Item [Line Items] Segment Reporting, Revenue Reconciling Item [Line Items] Other Other Intangible Assets [Member] Name Trading Arrangement, Individual Name All Award Types Award Type [Domain] Equity Awards Adjustments Equity Awards Adjustments [Member] Reconciliation of Revenue from Segments to Consolidated [Table] Reconciliation of Revenue from Segments to Consolidated [Table] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Other corporate revenue Other Income Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Discontinued Operations, Disposed of by Sale Discontinued Operations, Disposed of by Sale [Member] Compensation Amount Outstanding Recovery Compensation Amount Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Fair value Estimate of Fair Value Measurement [Member] Amounts included in contract liability at the beginning of the period Contract with Customer, Liability, Revenue Recognized Amortization of postretirement liability losses included in net periodic benefit cost, tax Expenses reclassified from AOCI to income taxes Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax Schedule of Details of Expected Credit Losses Accounts Receivable, Allowance for Credit Loss [Table Text Block] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Name Awards Close in Time to MNPI Disclosures, Individual Name Weighted average common shares outstanding: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Revenue: Revenues [Abstract] Accumulated other comprehensive loss Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Revenue, Description Of Timing [Domain] Revenue, Description Of Timing [Domain] Revenue, Description Of Timing [Domain] 2027 Long-Term Debt, Maturity, Year One Segments [Domain] Segments [Domain] Asphalt Asphalt [Member] Asphalt Total noncurrent assets  Assets, Noncurrent Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Fair value, measurements [Domain] Fair Value Hierarchy and NAV [Domain] Inventories Increase (Decrease) in Inventories Schedule of Accounting Standards Update and Change in Accounting Principle Accounting Standards Update and Change in Accounting Principle [Table Text Block] Inventories Total Inventory, Net Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Minimum Minimum [Member] Noncurrent assets: Assets, Noncurrent [Abstract] Number of plant operations sold Disposal Group, Including Discontinued Operation, Number Of Plant Operations Sold Disposal Group, Including Discontinued Operation, Number Of Plant Operations Sold Net loss per share Earnings Per Share, Policy [Policy Text Block] Reduction to goodwill Measurement Period Adjustments Goodwill, Measurement Period Adjustment Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Company Selected Measure Name Company Selected Measure Name Fair Value Measurement [Domain] Fair Value Measurement [Domain] Disaggregation of revenue Revenue [Policy Text Block] Other noncurrent changes Increase (Decrease) in Other Noncurrent Assets and Liabilities, Net Senior Notes Senior Notes [Member] Debt Debt Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Accounts payable Accounts Payable, Current Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] All Executive Categories All Executive Categories [Member] Common stock, 300,000,000 shares authorized, $0.01 par value, 57,184,991 shares issued and 56,753,855 shares outstanding at March 31, 2026; 57,083,497 shares issued and 56,652,361 shares outstanding at March 31, 2025; 57,095,301 shares issued and 56,664,165 shares outstanding at December 31, 2025 Common Stock, Value, Issued Goodwill [Roll Forward] Goodwill [Roll Forward] Commitments and contingencies Commitments and Contingencies Disclosure [Text Block] Diluted (in shares) Weighted average common shares outstanding - diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Business segment data Segment Reporting, Policy [Policy Text Block] Commitments and contingencies Commitments and Contingencies Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Finite-lived intangibles acquired Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived Business Combination [Axis] Business Combination [Axis] Entity Small Business Entity Small Business Document Transition Report Document Transition Report Revenue, Description Of Timing, 12 Months Revenue, Description Of Timing, 12 Months [Member] Revenue, Description Of Timing, 12 Months New Accounting Standards Accounting Standards Update and Change in Accounting Principle [Text Block] Underlying Securities Award Underlying Securities Amount Equity component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Insurance contracts Cash Surrender Value, Fair Value Disclosure Less expected credit loss Beginning balance Ending balance Accounts Receivable, Allowance for Credit Loss Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Total segment EBITDA Earnings Before Interest Tax Depreciation And Amortization Earnings Before Interest Tax Depreciation And Amortization Deferred tax liability acquired Business Combination, Recognized Liability Assumed, Deferred Tax Liability Document Type Document Type Significant Unobservable Inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Net Loss Per Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Loss Contingencies [Table] Loss Contingencies [Table] Postretirement liability adjustment Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Trade receivables Accounts and Other Receivables, Net, Current Product and Service [Axis] Product and Service [Axis] Investments used to satisfy nonqualified benefit plans obligations Life Insurance, Corporate or Bank Owned, Amount All Individuals All Individuals [Member] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Name Forgone Recovery, Individual Name Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Potential liabilities related to litigation and environmental matters Loss Contingency Accrual Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Disposal Group Name [Axis] Disposal Group Name [Axis] Tax withholding on stock-based compensation Payment, Tax Withholding, Share-Based Payment Arrangement Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Schedule of Finite-Lived Intangible Assets by Major Class [Table] Intangible Asset, Finite-Lived [Table] Term loan A agreement due on March 7, 2030 5.42% Term Loan Agreement Due 2030 [Member] 5.42% Term Loan Agreement Due 2030 Current liabilities: Liabilities, Current [Abstract] Other comprehensive income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Quoted Prices in Active Markets for Identical Assets (Level 1) Fair Value, Inputs, Level 1 [Member] Gains on sales of assets Gain (Loss) on Disposition of Assets West West Segment [Member] This segment mines, processes and sells construction aggregates. It also produces and sells asphalt and ready-mix concrete. This segment also manufactures prestressed concrete products. In addition this segment preforms integrated contracting services. This segment operates in Oregon and Washington. Diluted (in dollars per share) Net loss per share - diluted (in dollars per share) Earnings Per Share, Diluted Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Title of 12(b) Security Title of 12(b) Security Treasury stock held at cost (in shares) Treasury stock, beginning balance (in shares) Treasury stock, ending balance (in shares) Treasury Stock, Common, Shares Net loss per share Earnings Per Share [Abstract] Earnings Per Share [Abstract] Noncompete agreements Noncompete Agreements [Member] Consolidation Items [Domain] Consolidation Items [Domain] Change in net contract assets (liabilities) Contract with Customer, Assets and Liabilities, Net Current Change Amount of increase (decrease) in net contract assets and liabilities Gross loss Gross Profit Money market funds Money Market Funds, at Carrying Value Income taxes paid, net Income Taxes Paid, Net 2028 Finite-Lived Intangible Asset, Expected Amortization, Year Two Collaborative 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