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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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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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