CLOSURE AND POST-CLOSURE LIABILITIES (Tables)

6 Months Ended

Jun. 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 six months ended June 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
Adjustments during the measurement period related to acquisitions	—			(10,201		)	(10,201		)
New asset retirement obligations	1,937			—			1,937
Accretion	1,488			843			2,331
Changes in estimates recorded to statement of income	(16		)	135			119
Changes in estimates recorded to balance sheet	364			—			364
Expenditures	(1,604		)	(261		)	(1,865		)
Currency translation and other	(245		)	(60		)	(305		)
Balance at June 30, 2013	$	28,582		$	18,046		$	46,628