BUSINESS COMBINATIONS - Narrative (Detail) $ in Thousands	1 Months Ended	12 Months Ended
	Jan. 31, 2018 USD ($)	Dec. 31, 2017 transfer_station	Dec. 31, 2015 transfer_station
Business Acquisition [Line Items]
Number of businesses acquired			0
Intangible assets, useful life		10 years
Minimum
Business Acquisition [Line Items]
Intangible assets, useful life		5 years
Maximum
Business Acquisition [Line Items]
Intangible assets, useful life		10 years
Subsequent Event
Business Acquisition [Line Items]
Total consideration from Complete Disposal acquisition | $	$ 16,500
Eastern | Collection Business
Business Acquisition [Line Items]
Number of businesses acquired		1
Western | Solid Waste Collection Business
Business Acquisition [Line Items]
Number of businesses acquired		3