v3.26.1
Schedule of Assets (Held at End of Year) (Details) - EBP 006
$ in Thousands
12 Months Ended
Dec. 31, 2025
USD ($)
EBP, Schedule of Asset Held for Investment [Line Items]  
Entity Tax Identification Number 56-1848578
EBP, Plan Number 006
EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution $ 26,990
Employee Benefit Plan, Asset Held for Investment $ 1,068,336
Minimum  
EBP, Schedule of Asset Held for Investment [Line Items]  
Employee benefit plan, asset held for investment, participant loan, interest rate 4.00%
Maximum  
EBP, Schedule of Asset Held for Investment [Line Items]  
Employee benefit plan, asset held for investment, participant loan, interest rate 10.00%
Employee benefit plan, asset held for investment, participant loan, maturity date Nov. 30, 2039
Investment, Identifier [Axis]: BlackRock Institutional Trust Company, N.A BlackRock Equity Index Fund J  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] BlackRock Institutional Trust Company N.A [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Employee benefit plan, asset held for investment, excluding plan interest in master trust, current value $ 126,461
Investment, Identifier [Axis]: BlackRock Institutional Trust Company, N.A BlackRock Lifepath® Index 2030 O  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] BlackRock Institutional Trust Company N.A [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Employee benefit plan, asset held for investment, excluding plan interest in master trust, current value $ 81,122
Investment, Identifier [Axis]: BlackRock Institutional Trust Company, N.A BlackRock Lifepath® Index 2035 O  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] BlackRock Institutional Trust Company N.A [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Employee benefit plan, asset held for investment, excluding plan interest in master trust, current value $ 96,843
Investment, Identifier [Axis]: BlackRock Institutional Trust Company, N.A BlackRock Lifepath® Index 2040 O  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] BlackRock Institutional Trust Company N.A [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Employee benefit plan, asset held for investment, excluding plan interest in master trust, current value $ 75,162
Investment, Identifier [Axis]: BlackRock Institutional Trust Company, N.A BlackRock Lifepath® Index 2045 O  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] BlackRock Institutional Trust Company N.A [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Employee benefit plan, asset held for investment, excluding plan interest in master trust, current value $ 74,269
Investment, Identifier [Axis]: BlackRock Institutional Trust Company, N.A BlackRock Lifepath® Index 2050 O  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] BlackRock Institutional Trust Company N.A [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Employee benefit plan, asset held for investment, excluding plan interest in master trust, current value $ 67,006
Investment, Identifier [Axis]: BlackRock Institutional Trust Company, N.A BlackRock Lifepath® Index 2055 O  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] BlackRock Institutional Trust Company N.A [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Employee benefit plan, asset held for investment, excluding plan interest in master trust, current value $ 48,562
Investment, Identifier [Axis]: BlackRock Institutional Trust Company, N.A BlackRock Lifepath® Index 2060 O  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] BlackRock Institutional Trust Company N.A [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Employee benefit plan, asset held for investment, excluding plan interest in master trust, current value $ 37,004
Investment, Identifier [Axis]: BlackRock Institutional Trust Company, N.A BlackRock Lifepath® Index 2065 O  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] BlackRock Institutional Trust Company N.A [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Employee benefit plan, asset held for investment, excluding plan interest in master trust, current value $ 19,651
Investment, Identifier [Axis]: BlackRock Institutional Trust Company, N.A BlackRock Lifepath® Index Retirement O  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] BlackRock Institutional Trust Company N.A [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Employee benefit plan, asset held for investment, excluding plan interest in master trust, current value $ 65,719
Investment, Identifier [Axis]: BlackRock Institutional Trust Company, N.A BlackRock Mid Cap Equity Index Fund M  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] BlackRock Institutional Trust Company N.A [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Employee benefit plan, asset held for investment, excluding plan interest in master trust, current value $ 10,582
Investment, Identifier [Axis]: BlackRock Institutional Trust Company, N.A BlackRock Russell 2000 Index Fund M  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] BlackRock Institutional Trust Company N.A [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Employee benefit plan, asset held for investment, excluding plan interest in master trust, current value $ 1,624
Investment, Identifier [Axis]: BlackRock Institutional Trust Company, N.A BlackRock US Debt Index Fund M  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] BlackRock Institutional Trust Company N.A [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Employee benefit plan, asset held for investment, excluding plan interest in master trust, current value $ 1,845
Investment, Identifier [Axis]: Dodge & Cox Funds Dodge & Cox Income Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] Dodge & Cox Funds [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Employee benefit plan, asset held for investment, excluding plan interest in master trust, current value $ 16,615
Investment, Identifier [Axis]: Fidelity Investments Inc. Fidelity® Government Money Market Fund Class K6  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Investments Inc [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Employee benefit plan, asset held for investment, excluding plan interest in master trust, current value $ 89
EBP, Asset Held for Investment, Party-in-Interest [true false] true
Investment, Identifier [Axis]: Galliard Capital Management, LLC Galliard Stable Return Fund E  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] Galliard Capital Management LLC [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Employee benefit plan, asset held for investment, excluding plan interest in master trust, current value $ 62,771
Investment, Identifier [Axis]: Great Gray Trust Company, LLC Galliard Retirement Income Fund Class F35  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] Great Gray Trust Company, LLC [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Employee benefit plan, asset held for investment, excluding plan interest in master trust, current value $ 346
Investment, Identifier [Axis]: Harbor Funds Harbor Capital Appreciation R  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] Harbor Funds [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Employee benefit plan, asset held for investment, excluding plan interest in master trust, current value $ 70,339
Investment, Identifier [Axis]: IS MSCI EAFE INTL K iShares MSCI Europe, Australasia and Far East (EAFE®) International Index Fund Class K  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] IS MSCI EAFE INTL K [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Employee benefit plan, asset held for investment, excluding plan interest in master trust, current value $ 5,222
Investment, Identifier [Axis]: Martin Marietta Materials, Inc. Common Stock  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] Martin Marietta Materials, Inc [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] EBP, Employer, Common Stock [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Employee benefit plan, asset held for investment, excluding plan interest in master trust, current value $ 60,667
EBP, Asset Held for Investment, Party-in-Interest [true false] true
Investment, Identifier [Axis]: The Vanguard Group Vanguard Explorer Fund Admiral Shares  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] The Vanguard Group [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Employee benefit plan, asset held for investment, excluding plan interest in master trust, current value $ 28,197
Investment, Identifier [Axis]: The Vanguard Group Vanguard International Growth Fund Admiral Shares  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] The Vanguard Group [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Employee benefit plan, asset held for investment, excluding plan interest in master trust, current value $ 35,271
Investment, Identifier [Axis]: Washington Mutual American Funds Washington Mutual Class R-6  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] Washington Mutual [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Employee benefit plan, asset held for investment, excluding plan interest in master trust, current value $ 55,979