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REVENUE RECOGNITION - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Disaggregation of Revenue [Line Items] |  |
Total revenues | $ 262,595 | $ 234,027
Collection |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 139,977 | 119,531
Landfill |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 22,761 | 19,566
Transfer station |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 23,942 | 19,457
Transportation |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 4,763 | 4,130
Landfill gas-to-energy |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 1,924 | 2,654
Processing |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 24,382 | 29,215
National Accounts |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 44,846 | 39,474
Transferred at a point-in-time |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 7,288 | 15,717
Transferred over time |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 255,307 | 218,310
Eastern |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 83,909 | 71,319
Eastern | Collection |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 61,108 | 51,497
Eastern | Landfill |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 6,301 | 5,376
Eastern | Transfer station |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 13,981 | 11,613
Eastern | Transportation |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 1,183 | 1,472
Eastern | Landfill gas-to-energy |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 213 | 274
Eastern | Processing |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 1,123 | 1,087
Eastern | National Accounts |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 0 | 0
Eastern | Transferred at a point-in-time |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 119 | 120
Eastern | Transferred over time |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 83,790 | 71,199
Western |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 111,034 | 95,839
Western | Collection |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 78,869 | 68,034
Western | Landfill |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 16,460 | 14,190
Western | Transfer station |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 9,961 | 7,844
Western | Transportation |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 3,580 | 2,658
Western | Landfill gas-to-energy |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 1,711 | 2,380
Western | Processing |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 453 | 733
Western | National Accounts |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 0 | 0
Western | Transferred at a point-in-time |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 731 | 511
Western | Transferred over time |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 110,303 | 95,328
Resource Solutions |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 67,652 | 66,869
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 | 22,806 | 27,395
Resource Solutions | National Accounts |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 44,846 | 39,474
Resource Solutions | Transferred at a point-in-time |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 6,438 | 15,086
Resource Solutions | Transferred over time |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | $ 61,214 | $ 51,783

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