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REVENUE RECOGNITION - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2026 | Mar. 31, 2025
Disaggregation of Revenue [Line Items] |  |
Total revenues | $ 457,328 | $ 417,101
Transferred at a point-in-time |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 9,550 | 12,521
Transferred over time |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 447,778 | 404,580
Collection |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 309,652 | 276,461
Landfill |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 21,478 | 20,917
Transfer station |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 28,033 | 27,568
Transportation |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 4,647 | 5,214
Landfill gas-to-energy |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 2,935 | 2,765
Processing |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 45,099 | 46,495
National Accounts |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 45,484 | 37,681
Eastern |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 111,287 | 104,740
Eastern | Transferred at a point-in-time |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 196 | 96
Eastern | Transferred over time |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 111,091 | 104,644
Eastern | Collection |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 87,556 | 81,062
Eastern | Landfill |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 6,545 | 6,796
Eastern | Transfer station |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 13,663 | 13,680
Eastern | Transportation |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 1,419 | 1,348
Eastern | Landfill gas-to-energy |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 663 | 252
Eastern | Processing |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 1,441 | 1,602
Eastern | National Accounts |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 0 | 0
Western |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 162,448 | 152,316
Western | Transferred at a point-in-time |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 243 | 704
Western | Transferred over time |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 162,205 | 151,612
Western | Collection |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 129,086 | 118,605
Western | Landfill |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 14,084 | 13,434
Western | Transfer station |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 13,435 | 13,521
Western | Transportation |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 3,228 | 3,866
Western | Landfill gas-to-energy |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 2,272 | 2,513
Western | Processing |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 343 | 377
Western | National Accounts |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 0 | 0
Mid-Atlantic |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 94,794 | 77,848
Mid-Atlantic | Transferred at a point-in-time |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 0 | 0
Mid-Atlantic | Transferred over time |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 94,794 | 77,848
Mid-Atlantic | Collection |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 93,010 | 76,794
Mid-Atlantic | Landfill |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 849 | 687
Mid-Atlantic | Transfer station |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 935 | 367
Mid-Atlantic | Transportation |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 0 | 0
Mid-Atlantic | Landfill gas-to-energy |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 0 | 0
Mid-Atlantic | Processing |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 0 | 0
Mid-Atlantic | National Accounts |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 0 | 0
Resource Solutions |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 88,799 | 82,197
Resource Solutions | Transferred at a point-in-time |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 9,111 | 11,721
Resource Solutions | Transferred over time |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 79,688 | 70,476
Resource Solutions | Collection |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 0 | 0
Resource Solutions | Landfill |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 0 | 0
Resource Solutions | Transfer station |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 0 | 0
Resource Solutions | Transportation |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 0 | 0
Resource Solutions | Landfill gas-to-energy |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 0 | 0
Resource Solutions | Processing |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 43,315 | 44,516
Resource Solutions | National Accounts |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | $ 45,484 | $ 37,681

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