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REVENUE RECOGNITION - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | $ 465,334 | $ 377,163 | $ 882,435 | $ 718,170
Transferred at a point-in-time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 15,843 | 15,957 | 28,365 | 29,250
Transferred over time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 449,491 | 361,206 | 854,070 | 688,920
Collection |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 297,905 | 223,959 | 574,368 | 435,318
Landfill |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 26,055 | 24,782 | 46,972 | 44,332
Transfer station |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 39,379 | 35,344 | 66,944 | 61,817
Transportation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 6,145 | 4,997 | 11,360 | 9,113
Landfill gas-to-energy |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 1,556 | 1,983 | 4,321 | 4,493
Processing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 39,050 | 36,155 | 72,998 | 67,846
National Accounts |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 55,244 | 49,943 | 105,472 | 95,251
Eastern |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 120,924 | 113,533 | 225,664 | 213,723
Eastern | Transferred at a point-in-time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 92 | 117 | 189 | 239
Eastern | Transferred over time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 120,832 | 113,416 | 225,475 | 213,484
Eastern | Collection |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 89,331 | 81,312 | 170,393 | 156,319
Eastern | Landfill |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 7,935 | 7,583 | 14,731 | 14,195
Eastern | Transfer station |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 19,478 | 20,298 | 33,157 | 35,752
Eastern | Transportation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 1,741 | 1,570 | 3,089 | 2,960
Eastern | Landfill gas-to-energy |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 292 | 539 | 545 | 997
Eastern | Processing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 2,147 | 2,231 | 3,749 | 3,500
Eastern | National Accounts |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Western |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 170,134 | 137,312 | 322,451 | 260,956
Western | Transferred at a point-in-time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 693 | 677 | 1,397 | 1,294
Western | Transferred over time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 169,441 | 136,635 | 321,054 | 259,662
Western | Collection |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 127,730 | 100,695 | 246,337 | 195,818
Western | Landfill |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 16,912 | 16,516 | 30,346 | 28,957
Western | Transfer station |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 19,387 | 14,586 | 32,907 | 25,231
Western | Transportation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 4,404 | 3,422 | 8,271 | 6,146
Western | Landfill gas-to-energy |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 1,264 | 1,444 | 3,776 | 3,496
Western | Processing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 437 | 649 | 814 | 1,308
Western | National Accounts |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Mid-Atlantic |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 82,566 | 43,100 | 160,413 | 85,202
Mid-Atlantic | Transferred at a point-in-time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Mid-Atlantic | Transferred over time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 82,566 | 43,100 | 160,413 | 85,202
Mid-Atlantic | Collection |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 80,844 | 41,952 | 157,638 | 83,181
Mid-Atlantic | Landfill |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 1,208 | 683 | 1,895 | 1,180
Mid-Atlantic | Transfer station |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 514 | 460 | 880 | 834
Mid-Atlantic | Transportation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 5 | 0 | 7
Mid-Atlantic | Landfill gas-to-energy |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Mid-Atlantic | Processing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Mid-Atlantic | National Accounts |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Resource Solutions |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 91,710 | 83,218 | 173,907 | 158,289
Resource Solutions | Transferred at a point-in-time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 15,058 | 15,163 | 26,779 | 27,717
Resource Solutions | Transferred over time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 76,652 | 68,055 | 147,128 | 130,572
Resource Solutions | Collection |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Resource Solutions | Landfill |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Resource Solutions | Transfer station |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Resource Solutions | Transportation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Resource Solutions | Landfill gas-to-energy |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Resource Solutions | Processing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 36,466 | 33,275 | 68,435 | 63,038
Resource Solutions | National Accounts |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | $ 55,244 | $ 49,943 | $ 105,472 | $ 95,251

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