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SEGMENT REPORTING - Summary of Revenues Attributable to Services Provided by Company (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue from External Customer [Line Items]
Revenues	$ 295,268	$ 241,969	$ 812,962	$ 647,375
Solid waste operations
Revenue from External Customer [Line Items]
Revenues	215,040	178,677	584,346	476,696
Collection
Revenue from External Customer [Line Items]
Revenues	144,117	118,872	400,910	323,667
Disposal
Revenue from External Customer [Line Items]
Revenues	66,147	55,593	169,503	142,618
Power generation
Revenue from External Customer [Line Items]
Revenues	1,643	1,253	6,050	3,657
Processing
Revenue from External Customer [Line Items]
Revenues	3,133	2,959	7,883	6,754
Resource Solutions operations
Revenue from External Customer [Line Items]
Revenues	80,228	63,292	228,616	170,679
Processing
Revenue from External Customer [Line Items]
Revenues	32,159	27,418	93,421	65,721
Non-processing
Revenue from External Customer [Line Items]
Revenues	$ 48,069	$ 35,874	$ 135,195	$ 104,958

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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