CLOSURE AND POST-CLOSURE LIABILITIES (Tables)

3 Months Ended

Mar. 31, 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 March 31, 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 acquisition	—			98			98
New asset retirement obligations	719			—			719
Accretion	742			689			1,431
Changes in estimates recorded to statement of operations	—			40			40
Changes in estimates recorded to balance sheet	2,798			—			2,798
Expenditures	(163		)	(629		)	(792		)
Currency translation and other	50			146			196
Balance at March 31, 2019	$	41,955		$	32,466		$	74,421