XML 22 R18.htm IDEA: XBRL DOCUMENT v3.25.2
Schedule of Assets (Held at End of Year) (Details) - EBP 56-1848578 006
$ in Thousands
12 Months Ended
Dec. 31, 2024
USD ($)
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]  
Entity Tax Identification Number 56-1848578
Employee Benefit Plan, Plan Number 006
Employee Benefit Plan, Asset Held for Investment, Participant Loan, after Deemed Distribution $ 24,014
Employee Benefit Plan, Asset Held for Investment $ 902,309
Minimum  
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]  
Employee benefit plan, asset held for investment, participant loan, interest rate 4.25%
Maximum  
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]  
Employee benefit plan, asset held for investment, participant loan, interest rate 9.50%
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  
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] BlackRock Institutional Trust Company N.A [Member]
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Common Collective Trust [Member]
Employee Benefit Plan, 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 $ 106,076
Investment, Identifier [Axis]: BlackRock Institutional Trust Company, N.A BlackRock Lifepath® Index 2030 O  
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] BlackRock Institutional Trust Company N.A [Member]
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Common Collective Trust [Member]
Employee Benefit Plan, 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 $ 70,681
Investment, Identifier [Axis]: BlackRock Institutional Trust Company, N.A BlackRock Lifepath® Index 2035 O  
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] BlackRock Institutional Trust Company N.A [Member]
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Common Collective Trust [Member]
Employee Benefit Plan, 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 $ 75,260
Investment, Identifier [Axis]: BlackRock Institutional Trust Company, N.A BlackRock Lifepath® Index 2040 O  
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] BlackRock Institutional Trust Company N.A [Member]
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Common Collective Trust [Member]
Employee Benefit Plan, 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 $ 56,953
Investment, Identifier [Axis]: BlackRock Institutional Trust Company, N.A BlackRock Lifepath® Index 2045 O  
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] BlackRock Institutional Trust Company N.A [Member]
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Common Collective Trust [Member]
Employee Benefit Plan, 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 $ 55,648
Investment, Identifier [Axis]: BlackRock Institutional Trust Company, N.A BlackRock Lifepath® Index 2050 O  
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] BlackRock Institutional Trust Company N.A [Member]
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Common Collective Trust [Member]
Employee Benefit Plan, 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 $ 51,232
Investment, Identifier [Axis]: BlackRock Institutional Trust Company, N.A BlackRock Lifepath® Index 2055 O  
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] BlackRock Institutional Trust Company N.A [Member]
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Common Collective Trust [Member]
Employee Benefit Plan, 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 $ 36,277
Investment, Identifier [Axis]: BlackRock Institutional Trust Company, N.A BlackRock Lifepath® Index 2060 O  
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] BlackRock Institutional Trust Company N.A [Member]
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Common Collective Trust [Member]
Employee Benefit Plan, 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 $ 26,986
Investment, Identifier [Axis]: BlackRock Institutional Trust Company, N.A BlackRock Lifepath® Index 2065 O  
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] BlackRock Institutional Trust Company N.A [Member]
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Common Collective Trust [Member]
Employee Benefit Plan, 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 $ 11,352
Investment, Identifier [Axis]: BlackRock Institutional Trust Company, N.A BlackRock Lifepath® Index Retirement O  
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] BlackRock Institutional Trust Company N.A [Member]
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Common Collective Trust [Member]
Employee Benefit Plan, 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 $ 63,474
Investment, Identifier [Axis]: BlackRock Institutional Trust Company, N.A BlackRock Mid Cap Equity Index Fund M  
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] BlackRock Institutional Trust Company N.A [Member]
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Common Collective Trust [Member]
Employee Benefit Plan, 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 $ 8,536
Investment, Identifier [Axis]: BlackRock Institutional Trust Company, N.A BlackRock Russell 2000 Index Fund M  
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] BlackRock Institutional Trust Company N.A [Member]
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Common Collective Trust [Member]
Employee Benefit Plan, 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 $ 931
Investment, Identifier [Axis]: BlackRock Institutional Trust Company, N.A BlackRock US Debt Index Fund M  
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] BlackRock Institutional Trust Company N.A [Member]
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Common Collective Trust [Member]
Employee Benefit Plan, 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 $ 999
Investment, Identifier [Axis]: Dodge & Cox Funds Dodge & Cox Income Fund  
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Dodge & Cox Funds [Member]
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Mutual Fund [Member]
Employee Benefit Plan, 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 $ 14,082
Investment, Identifier [Axis]: Fidelity Investments Inc. Fidelity® Government Money Market Fund Class K6  
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Fidelity Investments Inc [Member]
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Mutual Fund [Member]
Employee Benefit Plan, 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 $ 394
Employee Benefit Plan, Asset Held for Investment, Party-in-Interest [true false] true
Investment, Identifier [Axis]: Galliard Capital Management, LLC Galliard Stable Return Fund E  
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Galliard Capital Management LLC [Member]
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Common Collective Trust [Member]
Employee Benefit Plan, 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 $ 66,293
Investment, Identifier [Axis]: Harbor Funds Harbor Capital Appreciation R  
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Harbor Funds [Member]
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Common Collective Trust [Member]
Employee Benefit Plan, 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 $ 62,958
Investment, Identifier [Axis]: IS MSCI EAFE INTL K iShares MSCI Europe, Australasia and Far East (EAFE®) International Index Fund Class K  
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] IS MSCI EAFE INTL K [Member]
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Mutual Fund [Member]
Employee Benefit Plan, 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 $ 1,605
Investment, Identifier [Axis]: Martin Marietta Materials, Inc. Common Stock  
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Martin Marietta Materials, Inc [Member]
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Employee Benefit Plan, Employer, Common Stock [Member]
Employee Benefit Plan, 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 $ 56,373
Employee Benefit Plan, Asset Held for Investment, Party-in-Interest [true false] true
Investment, Identifier [Axis]: The Vanguard Group Vanguard Explorer Fund Admiral Shares  
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] The Vanguard Group [Member]
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Mutual Fund [Member]
Employee Benefit Plan, 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 $ 30,076
Investment, Identifier [Axis]: The Vanguard Group Vanguard International Growth Fund Admiral Shares  
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] The Vanguard Group [Member]
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Mutual Fund [Member]
Employee Benefit Plan, 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 $ 31,143
Investment, Identifier [Axis]: Washington Mutual American Funds Washington Mutual Class R-6  
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]  
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration] Washington Mutual [Member]
Employee Benefit Plan, Investment, Type [Extensible Enumeration] Mutual Fund [Member]
Employee Benefit Plan, 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 $ 50,966