CLOSURE AND POST-CLOSURE LIABILITIES

3 Months Ended

Mar. 31, 2013

Asset Retirement Obligation Disclosure [Abstract]

CLOSURE AND POST-CLOSURE LIABILITIES

CLOSURE AND POST-CLOSURE LIABILITIES

The changes to closure and post-closure liabilities (also referred to as “asset retirement obligations”) for the three months ended March 31, 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	860			—			860
Accretion	739			416			1,155
Changes in estimates recorded to statement of income	(16		)	58			42
Changes in estimates recorded to balance sheet	369			—			369
Expenditures	(934		)	(70		)	(1,004		)
Currency translation and other	(93		)	(23		)	(116		)
Balance at March 31, 2013	$	27,583		$	17,770		$	45,353

All of the landfill facilities included in the above were active as of March 31, 2013. New asset retirement obligations incurred during the first quarter of 2013 were discounted at the credit-adjusted risk-free rate of 6.60%. There were no significant charges (benefits) in 2013 resulting from changes in estimates for closure and post-closure liabilities.