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SEGMENT REPORTING - Summary of Revenue Attributable to Services Provided by Company (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Revenue from External Customer [Line Items] |  |  |
Revenues | $ 889,211 | $ 774,584 | $ 743,290
Product concentration risk | Revenue |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenues percentage | 100.00% | 100.00% | 100.00%
Solid waste operations |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenues | $ 654,089 | $ 578,274 | $ 564,687
Solid waste operations | Product concentration risk | Revenue |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenues percentage | 73.60% | 74.70% | 76.10%
Collection |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenues | $ 442,685 | $ 391,438 | $ 372,041
Collection | Product concentration risk | Revenue |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenues percentage | 49.80% | 50.50% | 50.10%
Disposal |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenues | $ 196,985 | $ 175,546 | $ 181,895
Disposal | Product concentration risk | Revenue |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenues percentage | 22.20% | 22.70% | 24.50%
Power generation |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenues | $ 5,138 | $ 4,072 | $ 3,576
Power generation | Product concentration risk | Revenue |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenues percentage | 0.60% | 0.50% | 0.50%
Processing |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenues | $ 9,281 | $ 7,218 | $ 7,175
Processing | Product concentration risk | Revenue |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenues percentage | 1.00% | 1.00% | 1.00%
Resource Solutions operations |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenues | $ 235,122 | $ 196,310 | $ 178,603
Resource Solutions operations | Product concentration risk | Revenue |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenues percentage | 26.40% | 25.30% | 23.90%
Processing |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenues | $ 93,323 | $ 62,539 | $ 53,981
Processing | Product concentration risk | Revenue |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenues percentage | 10.50% | 8.00% | 7.10%
Non-processing |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenues | $ 141,799 | $ 133,771 | $ 124,622
Non-processing | Product concentration risk | Revenue |  |  |
Revenue from External Customer [Line Items] |  |  |
Revenues percentage | 15.90% | 17.30% | 16.80%

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