SEGMENT REPORTING - Summary of Financial Information by Reportable Segment (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
Segment Reporting Information [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
Inter-company revenue										0	0
Depreciation and amortization									41,485	61,856	62,704	60,339
Operating income	9,997	$ 17,378	$ 15,596	$ 1,974	4,702	$ 12,696	$ 11,342	$ 3,126	22,110	44,945	31,866	11,916
Interest expense, net									25,392	38,652	40,090	37,863
Capital expenditures									55,061	54,238	49,995	45,959
Goodwill	119,899				118,976				119,170	119,899	118,976	119,139
Total assets	631,512				633,669				658,199	631,512	633,669	638,285
Eastern
Segment Reporting Information [Line Items]
Goodwill	17,429				17,429				17,429	17,429	17,429
Western
Segment Reporting Information [Line Items]
Goodwill	88,426				87,503				87,697	88,426	87,503
Recycling
Segment Reporting Information [Line Items]
Goodwill	12,315				12,315				12,315	12,315	12,315
Other
Segment Reporting Information [Line Items]
Goodwill	1,729				1,729				1,729	1,729	1,729
Operating Segments
Segment Reporting Information [Line Items]
Goodwill												1,729
Operating Segments | Eastern
Segment Reporting Information [Line Items]
Revenues									108,423	176,539	167,467	147,330
Depreciation and amortization									17,195	27,036	25,977	24,961
Operating income									3,434	9,697	7,338	(1,105)
Interest expense, net									(315)	(16)	(200)	(272)
Capital expenditures									27,354	18,363	24,840	19,870
Goodwill	17,429				17,429				17,429	17,429	17,429	17,429
Total assets	202,420				212,922				211,020	202,420	212,922	200,235
Operating Segments | Western
Segment Reporting Information [Line Items]
Revenues									156,877	233,168	231,951	216,911
Depreciation and amortization									19,775	27,511	29,488	28,693
Operating income									18,840	30,576	26,035	13,298
Interest expense, net									(6)	(248)	165	112
Capital expenditures									21,884	31,637	20,282	20,471
Goodwill	88,426				87,503				87,697	88,426	87,503	87,666
Total assets	327,628				318,730				333,028	327,628	318,730	331,304
Operating Segments | Recycling
Segment Reporting Information [Line Items]
Revenues									33,741	52,911	46,338	43,825
Depreciation and amortization									2,876	4,212	4,480	4,262
Operating income									(238)	2,542	(2,406)	(2,435)
Interest expense, net									0	156	25	0
Capital expenditures									3,016	2,218	1,770	1,111
Goodwill	12,316				12,315				12,315	12,316	12,315	12,315
Total assets	49,931				49,355				52,016	49,931	49,355	49,652
Operating Segments | Other
Segment Reporting Information [Line Items]
Revenues									69,333	102,412	100,744	89,567
Depreciation and amortization									1,639	3,097	2,759	2,423
Operating income									74	2,130	899	2,158
Interest expense, net									25,713	38,760	40,100	38,023
Capital expenditures									2,807	2,020	3,103	4,507
Goodwill	1,728				1,729				1,729	1,728	1,729
Total assets	51,533				52,662				62,135	51,533	52,662	57,094
Elimination
Segment Reporting Information [Line Items]
Revenues										0	0
Inter-company revenue									(83,663)	(116,331)	(113,853)	(111,635)
Depreciation and amortization									0	0	0	0
Operating income									0	0	0	0
Interest expense, net									0	0	0	0
Capital expenditures									0	0	0	0
Goodwill	0				0				0	0	0	0
Total assets	$ 0				$ 0				0	0	0	0
Elimination | Eastern
Segment Reporting Information [Line Items]
Inter-company revenue									31,840	45,728	43,560	38,946
Elimination | Western
Segment Reporting Information [Line Items]
Inter-company revenue									50,235	67,985	68,284	70,809
Elimination | Recycling
Segment Reporting Information [Line Items]
Inter-company revenue									(175)	1,003	995	(139)
Elimination | Other
Segment Reporting Information [Line Items]
Inter-company revenue									$ 1,763	$ 1,615	$ 1,014	$ 2,019