SEGMENT REPORTING - Summary of Financial Information by Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Revenues	$ 133,802	$ 125,432
Inter-Company Revenues	0	0
Depreciation and amortization	13,849	14,453
Operating income (loss)	6,564	1,974
Total assets	621,249	620,406	$ 631,512
Operating Segments | Eastern
Segment Reporting Information [Line Items]
Revenues	38,686	38,987
Depreciation and amortization	5,404	6,190
Operating income (loss)	21	(788)
Total assets	197,817	209,315
Operating Segments | Western
Segment Reporting Information [Line Items]
Revenues	54,144	52,462
Depreciation and amortization	6,604	6,490
Operating income (loss)	4,089	2,993
Total assets	324,262	312,369
Operating Segments | Recycling
Segment Reporting Information [Line Items]
Revenues	16,635	10,638
Depreciation and amortization	1,004	1,092
Operating income (loss)	1,583	(1,074)
Total assets	50,138	48,042
Operating Segments | Other
Segment Reporting Information [Line Items]
Revenues	24,337	23,345
Depreciation and amortization	837	681
Operating income (loss)	871	843
Total assets	49,032	50,680
Eliminations
Segment Reporting Information [Line Items]
Revenues	0	0
Inter-Company Revenues	(25,433)	(25,299)
Depreciation and amortization	0	0
Operating income (loss)	0	0
Total assets	0	0
Eliminations | Eastern
Segment Reporting Information [Line Items]
Inter-Company Revenues	9,522	9,536
Eliminations | Western
Segment Reporting Information [Line Items]
Inter-Company Revenues	15,781	14,852
Eliminations | Recycling
Segment Reporting Information [Line Items]
Inter-Company Revenues	(244)	631
Eliminations | Other
Segment Reporting Information [Line Items]
Inter-Company Revenues	$ 374	$ 280