CLOSURE AND POST-CLOSURE LIABILITIES (Tables)

9 Months Ended

Sep. 30, 2015

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”) for the nine months ended September 30, 2015 were as follows (in thousands):

	Landfill Retirement Liability			Non-Landfill Retirement Liability			Total
Balance at January 1, 2015	$	29,932		$	20,769		$	50,701
Liabilities assumed in acquisitions	—			1,676			1,676
New asset retirement obligations	2,325			—			2,325
Accretion	1,887			1,567			3,454
Changes in estimates recorded to statement of income	13			—			13
Changes in estimates recorded to balance sheet	1,370			—			1,370
Expenditures	(5,490		)	(259		)	(5,749		)
Currency translation and other	(323		)	(203		)	(526		)
Balance at September 30, 2015	$	29,714		$	23,550		$	53,264