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Financial Instruments - Fair Value Assets Measured on Recurring Basis (Details) - Recurring - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Restricted investments: |  |
Rabbi Trusts | $ 59,495 | $ 51,247
Marketable equity and fixed income securities | 54,392 | 47,382
Other non-current assets | 19,345 | 18,887
Quoted Prices in Active Markets (Level 1) |  |
Restricted investments: |  |
Rabbi Trusts | 12,635 | 9,547
Marketable equity and fixed income securities | 2,069 | 19,010
Significant Other Observable Inputs (Level 2) |  |
Restricted investments: |  |
Rabbi Trusts | 46,860 | 41,700
Marketable equity and fixed income securities | 52,323 | 28,372
Other non-current assets | 19,345 | 18,887
Interest Rate Swap |  |
Restricted investments: |  |
Interest rate swap derivatives | 4,851 | 3,849
Interest Rate Swap | Significant Other Observable Inputs (Level 2) |  |
Restricted investments: |  |
Interest rate swap derivatives | $ 4,851 | $ 3,849

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