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REMEDIAL LIABILITIES - Estimates (Details) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2024 USD ($) facility business | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Site Contingency [Line Items] |  |  |
Number of businesses acquired | business | 3 |  |
Accrual for environmental loss contingencies | 5.00% |  |
Accrual for environmental loss contingencies | $ 111,745 | $ 111,243 | $ 116,290
% of Total | 100.00% |  |
Reasonably possible additional liabilities | $ 21,558 |  |
Loss contingency accrual | 29,800 | 32,400 |
Total remedial liabilities | 111,745 | 111,243 | $ 116,290
Legal and Administrative Proceedings |  |  |
Site Contingency [Line Items] |  |  |
Loss contingency accrual | $ 23,300 | $ 25,000 |
Inactive facilities not used in active conduct of the Company's business, most of which were assumed through prior period acquisitions (25 facilities) |  |  |
Site Contingency [Line Items] |  |  |
Number of facility by type | facility | 25 |  |
Accrual for environmental loss contingencies | $ 56,976 |  |
% of Total | 51.00% |  |
Reasonably possible additional liabilities | $ 10,765 |  |
Total remedial liabilities | $ 56,976 |  |
Facilities now used in active conduct of the Company's business (62 facilities, including 24 acquired by the Company through acquisitions in 2024) |  |  |
Site Contingency [Line Items] |  |  |
Number of facility by type | facility | 62 |  |
Number of businesses acquired | business | 24 |  |
Accrual for environmental loss contingencies | $ 46,131 |  |
% of Total | 41.30% |  |
Reasonably possible additional liabilities | $ 9,497 |  |
Total remedial liabilities | $ 46,131 |  |
Superfund sites (12 sites) |  |  |
Site Contingency [Line Items] |  |  |
Number of facility by type | facility | 12 |  |
Accrual for environmental loss contingencies | $ 8,638 |  |
% of Total | 7.70% |  |
Reasonably possible additional liabilities | $ 1,296 |  |
Total remedial liabilities | $ 8,638 |  |
Superfund sites (12 sites) | Various |  |  |
Site Contingency [Line Items] |  |  |
Number of facility by type | facility | 12 |  |
Accrual for environmental loss contingencies | $ 8,638 |  |
% of Total | 7.70% |  |
Reasonably possible additional liabilities | $ 1,296 |  |
Total remedial liabilities | 8,638 |  |
Closed incinerator and landfill | Baton Rouge, LA |  |  |
Site Contingency [Line Items] |  |  |
Accrual for environmental loss contingencies | $ 25,578 |  |
% of Total | 22.90% |  |
Reasonably possible additional liabilities | $ 4,303 |  |
Total remedial liabilities | 25,578 |  |
Closed incinerator | Bridgeport, NJ |  |  |
Site Contingency [Line Items] |  |  |
Accrual for environmental loss contingencies | $ 17,417 |  |
% of Total | 15.60% |  |
Reasonably possible additional liabilities | $ 3,254 |  |
Total remedial liabilities | 17,417 |  |
Idled incinerator | Mercier, Quebec |  |  |
Site Contingency [Line Items] |  |  |
Accrual for environmental loss contingencies | $ 10,826 |  |
% of Total | 9.70% |  |
Reasonably possible additional liabilities | $ 1,631 |  |
Total remedial liabilities | 10,826 |  |
Operating solvent recycling center | Linden, NJ |  |  |
Site Contingency [Line Items] |  |  |
Accrual for environmental loss contingencies | $ 9,434 |  |
% of Total | 8.40% |  |
Reasonably possible additional liabilities | $ 2,148 |  |
Total remedial liabilities | $ 9,434 |  |
All other incinerators, landfills, wastewater treatment facilities and service centers (83 facilities, including 24 acquired by the Company through acquisitions in 2024) | Various |  |  |
Site Contingency [Line Items] |  |  |
Number of facility by type | facility | 83 |  |
Accrual for environmental loss contingencies | $ 39,852 |  |
% of Total | 35.70% |  |
Reasonably possible additional liabilities | $ 8,926 |  |
Total remedial liabilities | $ 39,852 |  |

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