CLOSURE AND POST-CLOSURE LIABILITIES (Tables)

6 Months Ended

Jun. 30, 2019

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, 2019 through June 30, 2019 were as follows (in thousands):

	Landfill Retirement Liability			Non-Landfill Retirement Liability			Total
Balance at January 1, 2019	$	37,809		$	32,122		$	69,931
Liabilities assumed in acquisitions	—			220			220
New asset retirement obligations	1,058			—			1,058
Accretion	1,455			1,387			2,842
Changes in estimates recorded to statement of operations	—			107			107
Changes in estimates recorded to balance sheet	2,798			—			2,798
Expenditures	(319		)	(1,219		)	(1,538		)
Currency translation and other	222			190			412
Balance at June 30, 2019	$	43,023		$	32,807		$	75,830