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REVENUE RECOGNITION (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | $ 1,085,089 | $ 889,211 | $ 774,584
Eastern |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 340,058 | 264,569 | 220,285
Western |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 445,153 | 389,520 | 357,989
Resource Solutions |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 299,878 | 235,122 | 196,310
Collection |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 539,587 | 442,685 | 391,438
Collection | Eastern |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 233,043 | 175,816 | 147,698
Collection | Western |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 306,544 | 266,869 | 243,740
Collection | Resource Solutions |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 0 | 0 | 0
Landfill |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 97,542 | 91,973 | 85,549
Landfill | Eastern |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 27,301 | 25,241 | 20,716
Landfill | Western |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 70,241 | 66,732 | 64,833
Landfill | Resource Solutions |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 0 | 0 | 0
Transfer |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 110,562 | 91,282 | 78,847
Transfer | Eastern |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 65,800 | 53,882 | 44,730
Transfer | Western |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 44,762 | 37,400 | 34,117
Transfer | Resource Solutions |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 0 | 0 | 0
Transportation |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 19,867 | 13,730 | 11,150
Transportation | Eastern |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 5,619 | 1,683 | 208
Transportation | Western |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 14,248 | 12,047 | 10,942
Transportation | Resource Solutions |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 0 | 0 | 0
Landfill gas-to-energy |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 7,519 | 5,138 | 4,072
Landfill gas-to-energy | Eastern |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 925 | 1,052 | 1,015
Landfill gas-to-energy | Western |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 6,594 | 4,086 | 3,057
Landfill gas-to-energy | Resource Solutions |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 0 | 0 | 0
Processing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 129,179 | 102,604 | 69,757
Processing | Eastern |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 7,370 | 6,895 | 5,918
Processing | Western |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 2,764 | 2,386 | 1,300
Processing | Resource Solutions |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 119,045 | 93,323 | 62,539
Customer Solutions |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 180,833 | 141,799 | 133,771
Customer Solutions | Eastern |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 0 | 0 | 0
Customer Solutions | Western |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 0 | 0 | 0
Customer Solutions | Resource Solutions |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 180,833 | 141,799 | 133,771
Transferred at a point-in-time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 55,335 | 65,551 | 31,328
Transferred at a point-in-time | Eastern |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 462 | 166 | 223
Transferred at a point-in-time | Western |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 2,138 | 1,719 | 1,484
Transferred at a point-in-time | Resource Solutions |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 52,735 | 63,666 | 29,621
Transferred over time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 1,029,754 | 823,660 | 743,256
Transferred over time | Eastern |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 339,596 | 264,403 | 220,062
Transferred over time | Western |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 443,015 | 387,801 | 356,505
Transferred over time | Resource Solutions |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | $ 247,143 | $ 171,456 | $ 166,689

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