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REMEDIAL LIABILITIES (Tables) | 9 Months Ended
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Sep. 30, 2025
Environmental Remediation Obligations [Abstract] |
Schedule of Changes to Remedial Liabilities | The changes to remedial liabilities from January 1, 2025 through September 30, 2025 were as follows (in thousands):
| Remedial Liabilities for Landfill Sites |  | Remedial Liabilities for Inactive Sites |  | Remedial Liabilities (Including Superfund) for Non-Landfill Operations |  | Total
Balance at January 1, 2025 | $ | 1,948 |  |  | $ | 57,036 |  |  | $ | 52,761 |  |  | $ | 111,745 |
Measurement period adjustment from a prior period acquisition | — |  |  | — |  |  | (90) |  |  | (90) |
Accretion | 70 |  |  | 1,763 |  |  | 1,026 |  |  | 2,859 |
Changes in estimates recorded to consolidated statement of operations | (72) |  |  | 76 |  |  | (9,781) |  |  | (9,777) |
Expenditures | (35) |  |  | (3,082) |  |  | (4,377) |  |  | (7,494) |
Currency translation and other | — |  |  | 86 |  |  | (12) |  |  | 74 |
Balance at September 30, 2025 | $ | 1,911 |  |  | $ | 55,879 |  |  | $ | 39,527 |  |  | $ | 97,317 |

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