SEGMENT REPORTING - Summary of Financial Information by Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Revenues	$ 151,222	$ 160,269	$ 154,016	$ 133,802	$ 143,795	$ 151,133	$ 144,670	$ 125,432	$ 599,309	$ 565,030	$ 546,500
Depreciation and amortization									62,102	61,856	62,704
Operating (loss) income	9,855	$ 18,277	$ (47,279)	$ 6,564	9,997	$ 17,378	$ 15,596	$ 1,974	(12,583)	44,945	31,866
Interest expense, net									24,887	38,652	40,090
Capital expenditures									64,862	54,238	49,995
Goodwill	122,605				119,899				122,605	119,899	118,976
Total assets	614,949				631,512				614,949	631,512	633,669
Eastern
Segment Reporting Information [Line Items]
Goodwill	19,192				17,429				19,192	17,429	17,429
Western
Segment Reporting Information [Line Items]
Goodwill	89,369				88,426				89,369	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 | Eastern
Segment Reporting Information [Line Items]
Revenues									181,170	176,539	167,467
Depreciation and amortization									23,815	27,036	25,977
Operating (loss) income									(51,867)	9,697	7,338
Interest expense, net									3	(16)	(200)
Capital expenditures									17,153	18,363	24,840
Goodwill	19,192				17,429				19,192	17,429	17,429
Total assets	157,248				202,420				157,248	202,420	212,922
Operating Segments | Western
Segment Reporting Information [Line Items]
Revenues									250,771	233,168	231,951
Depreciation and amortization									30,766	27,511	29,488
Operating (loss) income									35,035	30,576	26,035
Interest expense, net									(220)	(248)	165
Capital expenditures									42,082	31,637	20,282
Goodwill	89,369				88,426				89,369	88,426	87,503
Total assets	344,324				327,628				344,324	327,628	318,730
Operating Segments | Recycling
Segment Reporting Information [Line Items]
Revenues									62,307	52,911	46,338
Depreciation and amortization									4,125	4,212	4,480
Operating (loss) income									2,805	2,542	(2,406)
Interest expense, net									143	156	25
Capital expenditures									2,006	2,218	1,770
Goodwill	12,315				12,315				12,315	12,315	12,315
Total assets	48,612				49,931				48,612	49,931	49,355
Operating Segments | Other
Segment Reporting Information [Line Items]
Revenues									105,061	102,412	100,744
Depreciation and amortization									3,396	3,097	2,759
Operating (loss) income									1,444	2,130	899
Interest expense, net									24,961	38,760	40,100
Capital expenditures									3,621	2,020	3,103
Goodwill	1,729				1,729				1,729	1,729	1,729
Total assets	64,765				51,533				64,765	51,533	52,662
Eliminations
Segment Reporting Information [Line Items]
Revenues									(123,972)	(116,331)	(113,853)
Depreciation and amortization									0	0	0
Operating (loss) income									0	0	0
Interest expense, net									0	0	0
Capital expenditures									0	0	0
Goodwill	0				0				0	0	0
Total assets	$ 0				$ 0				0	0	0
Eliminations | Eastern
Segment Reporting Information [Line Items]
Revenues									50,335	45,728	43,560
Eliminations | Western
Segment Reporting Information [Line Items]
Revenues									71,510	67,985	68,284
Eliminations | Recycling
Segment Reporting Information [Line Items]
Revenues									246	1,003	995
Eliminations | Other
Segment Reporting Information [Line Items]
Revenues									$ 1,881	$ 1,615	$ 1,014