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Landfill Accounting - Liability Adjustments and Restricted Cash and Investments (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2025 | Dec. 31, 2024
Landfill Accounting [Line Items] |  |
Liability adjustments | $ 37,482 |
Final capping, closure and post-closure liability - current portion | 161,230 | $ 199,735
Final capping, closure and post-closure liability - noncurrent portion | 551,706 | 660,388
Restricted cash | 172,989 | 135,807
Restricted investments | 80,002 | 78,126
Landfill |  |
Landfill Accounting [Line Items] |  |
Restricted cash | 9,771 | 8,852
Restricted investments | $ 79,900 | $ 77,855

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