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REVENUE RECOGNITION - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | $ 352,735 | $ 295,268 | $ 904,975 | $ 812,962
Transferred at a point-in-time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 9,321 | 12,934 | 25,532 | 48,098
Transferred over time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 343,414 | 282,334 | 879,443 | 764,864
Collection |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 206,093 | 144,117 | 495,917 | 400,910
Landfill |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 26,151 | 28,140 | 75,052 | 72,847
Transfer station |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 34,951 | 32,755 | 91,321 | 81,486
Transportation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 5,235 | 5,252 | 15,060 | 15,170
Landfill gas-to-energy |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 1,797 | 1,643 | 5,042 | 6,050
Processing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 30,803 | 35,292 | 83,321 | 101,304
National Accounts |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 47,705 | 48,069 | 139,262 | 135,195
Eastern |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 97,507 | 93,137 | 274,740 | 251,720
Eastern | Transferred at a point-in-time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 121 | 115 | 339 | 352
Eastern | Transferred over time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 97,386 | 93,022 | 274,401 | 251,368
Eastern | Collection |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 68,944 | 61,875 | 194,801 | 172,671
Eastern | Landfill |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 7,588 | 7,900 | 21,109 | 19,819
Eastern | Transfer station |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 16,963 | 19,525 | 48,643 | 48,431
Eastern | Transportation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 1,328 | 1,233 | 3,718 | 4,470
Eastern | Landfill gas-to-energy |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 208 | 205 | 594 | 727
Eastern | Processing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 2,476 | 2,399 | 5,875 | 5,602
Eastern | National Accounts |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Western |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 136,019 | 121,903 | 371,281 | 332,626
Western | Transferred at a point-in-time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 651 | 439 | 2,072 | 1,467
Western | Transferred over time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 135,368 | 121,464 | 369,209 | 331,159
Western | Collection |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 93,924 | 82,242 | 257,891 | 228,239
Western | Landfill |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 18,563 | 20,240 | 53,943 | 53,028
Western | Transfer station |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 17,491 | 13,230 | 42,181 | 33,055
Western | Transportation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 3,907 | 4,019 | 11,342 | 10,700
Western | Landfill gas-to-energy |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 1,589 | 1,438 | 4,448 | 5,323
Western | Processing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 545 | 734 | 1,476 | 2,281
Western | National Accounts |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Mid-Atlantic |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 43,722 | 0 | 43,722 | 0
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 | 43,722 | 0 | 43,722 | 0
Mid-Atlantic | Collection |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 43,225 | 0 | 43,225 | 0
Mid-Atlantic | Landfill |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Mid-Atlantic | Transfer station |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 497 | 0 | 497 | 0
Mid-Atlantic | Transportation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
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 | 75,487 | 80,228 | 215,232 | 228,616
Resource Solutions | Transferred at a point-in-time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 8,549 | 12,380 | 23,121 | 46,279
Resource Solutions | Transferred over time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 66,938 | 67,848 | 192,111 | 182,337
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 | 27,782 | 32,159 | 75,970 | 93,421
Resource Solutions | National Accounts |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | $ 47,705 | $ 48,069 | $ 139,262 | $ 135,195

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