CLOSURE AND POST-CLOSURE LIABILITIES (Tables)

9 Months Ended

Sep. 30, 2013

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, 2013 were as follows (in thousands):

	Landfill Retirement Liability			Non-Landfill Retirement Liability			Total
Balance at January 1, 2013	$	26,658		$	27,590		$	54,248
Liabilities assumed in acquisitions	—			659			659
Adjustments during the measurement period related to acquisitions	—			(10,201		)	(10,201		)
New asset retirement obligations	3,321			—			3,321
Accretion	2,255			1,281			3,536
Changes in estimates recorded to statement of income	(398		)	99			(299		)
Changes in estimates recorded to balance sheet	299			—			299
Expenditures	(3,527		)	(310		)	(3,837		)
Currency translation and other	(152		)	(80		)	(232		)
Balance at September 30, 2013	$	28,456		$	19,038		$	47,494