CLOSURE AND POST-CLOSURE LIABILITIES (Tables)

6 Months Ended

Jun. 30, 2012

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, 2012 were as follows (in thousands):

	Landfill Retirement Liability			Non-Landfill Retirement Liability			Total
Balance at January 1, 2012	$	25,764		$	9,117		$	34,881
New asset retirement obligations	1,330			—			1,330
Accretion	1,414			528			1,942
Changes in estimates recorded to statement of income	—			298			298
Other changes in estimates recorded to balance sheet	(2,064		)	15			(2,049		)
Expenditures	(653		)	(209		)	(862		)
Currency translation and other	(9		)	16			7
Balance at June 30, 2012	$	25,782		$	9,765		$	35,547