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REMEDIAL LIABILITIES - Anticipated Payments (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Accrual for Environmental Loss Contingencies, Net [Abstract] |  |  |
2022 | $ 14,416 |  |
2023 | 17,530 |  |
2024 | 12,098 |  |
2025 | 7,769 |  |
2026 | 6,002 |  |
Thereafter | 73,185 |  |
Undiscounted remedial liabilities | 131,000 |  |
Less: Discount at risk free rates | (19,127) |  |
Total remedial liabilities | $ 111,873 | $ 114,813 | $ 114,173

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