CLOSURE AND POST-CLOSURE LIABILITIES (Tables)

3 Months Ended

Mar. 31, 2017

Asset Retirement Obligation Disclosure [Abstract]

Schedule of closure and post-closure liabilities

The changes to closure and post-closure liabilities (also referred to as “asset retirement obligations”) from January 1, 2017 through March 31, 2017 were as follows (in thousands):

	Landfill Retirement Liability			Non-Landfill Retirement Liability			Total
Balance at January 1, 2017	$	30,630		$	27,701		$	58,331
Measurement period adjustments from prior period acquisitions	—			596			596
New asset retirement obligations	431			—			431
Accretion	534			623			1,157
Changes in estimates recorded to statement of operations	—			(6		)	(6		)
Expenditures	(119		)	(73		)	(192		)
Currency translation and other	20			14			34
Balance at March 31, 2017	$	31,496		$	28,855		$	60,351