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Asset Retirement Obligations

12 Months Ended

Dec. 31, 2012

Asset Retirement Obligation Disclosure [Abstract]

The following table reconciles our AROs as of the dates presented, which are included in the Other liabilities caption on our Consolidated Balance Sheets:



	As of December 31,
	2012			2011
Balance at beginning of year	$	6,283		$	7,364
Liabilities incurred	57			214
Liabilities settled	(236		)	(183		)
Sale of properties	(1,976		)	(1,611		)
Accretion expense	385			499
Balance at end of year	$	4,513		$	6,283

- Definition

The entire disclosure for an asset retirement obligation and the associated long-lived asset. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

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