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SEGMENT REPORTING - Summary of Revenues Attributable to Services Provided by Company (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenue from External Customer [Line Items]
Revenues	$ 234,027	$ 189,532
Solid waste operations
Revenue from External Customer [Line Items]
Revenues	167,158	138,109
Collection
Revenue from External Customer [Line Items]
Revenues	119,531	97,469
Disposal
Revenue from External Customer [Line Items]
Revenues	43,153	37,853
Power generation
Revenue from External Customer [Line Items]
Revenues	2,654	1,303
Processing
Revenue from External Customer [Line Items]
Revenues	1,820	1,484
Resource solutions operations
Revenue from External Customer [Line Items]
Revenues	66,869	51,423
Processing
Revenue from External Customer [Line Items]
Revenues	27,395	17,272
Non-processing
Revenue from External Customer [Line Items]
Revenues	$ 39,474	$ 34,151

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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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