CLOSURE AND POST-CLOSURE LIABILITIES (Tables)

9 Months Ended

Sep. 30, 2016

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, 2016 through September 30, 2016 were as follows (in thousands):

	Landfill Retirement Liability			Non-Landfill Retirement Liability			Total
Balance at January 1, 2016	$	32,023		$	24,226		$	56,249
Liabilities assumed in acquisitions	—			2,408			2,408
Adjustments during the measurement period related to 2015 acquisitions	—			657			657
New asset retirement obligations	1,650			—			1,650
Accretion	1,996			1,748			3,744
Changes in estimates recorded to statement of operations	(597		)	(114		)	(711		)
Expenditures	(904		)	(709		)	(1,613		)
Currency translation and other	130			53			183
Balance at September 30, 2016	$	34,298		$	28,269		$	62,567