SEGMENT REPORTING - Summary of Revenue Attributable to Services Provided by Company (Detail) - USD ($) $ in Thousands	3 Months Ended								8 Months Ended	12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Apr. 30, 2014
Revenue from External Customer [Line Items]
Revenues	$ 143,795	$ 151,133	$ 144,670	$ 125,432	$ 140,024	$ 146,185	$ 143,714	$ 116,577	$ 368,374	$ 565,030	$ 546,500	$ 497,633
Revenues percentage									100.00%	100.00%	100.00%	100.00%
Collection
Revenue from External Customer [Line Items]
Revenues									$ 157,809	$ 249,640	$ 238,301	$ 225,441
Revenues percentage									42.80%	44.20%	43.60%	45.30%
Disposal
Revenue from External Customer [Line Items]
Revenues									$ 102,304	$ 154,211	$ 156,536	$ 128,778
Revenues percentage									27.80%	27.30%	28.60%	25.90%
Power generation
Revenue from External Customer [Line Items]
Revenues									$ 5,049	$ 5,921	$ 6,796	$ 9,512
Revenues percentage									1.40%	1.00%	1.20%	1.90%
Processing
Revenue from External Customer [Line Items]
Revenues									$ 6,643	$ 6,282	$ 6,061	$ 8,852
Revenues percentage									1.80%	1.10%	1.10%	1.80%
Solid waste operations
Revenue from External Customer [Line Items]
Revenues									$ 271,805	$ 416,054	$ 407,694	$ 372,583
Revenues percentage									73.80%	73.60%	74.50%	74.90%
Organics
Revenue from External Customer [Line Items]
Revenues									$ 27,012	$ 41,587	$ 39,134	$ 37,829
Revenues percentage									7.30%	7.40%	7.20%	7.60%
Customer solutions
Revenue from External Customer [Line Items]
Revenues									$ 35,816	$ 54,478	$ 53,334	$ 43,396
Revenues percentage									9.70%	9.60%	9.80%	8.70%
Recycling
Revenue from External Customer [Line Items]
Revenues									$ 33,741	$ 52,911	$ 46,338	$ 43,825
Revenues percentage									9.20%	9.40%	8.50%	8.80%