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Asset Retirement Obligations

6 Months Ended

Jun. 30, 2012

Asset Retirement Obligations [Abstract]

Note 7 — Asset Retirement Obligations

The following table reflects the changes to asset retirement obligations for the periods indicated (in thousands):


	Six Months Ended June 30,
	2011		2012
Asset retirement obligations at beginning of period	$	7,150	$	11,733
Liabilities incurred		44		75
Liabilities settled		—		(98	)
Accretion		322		420
Divestitures		—		—

Asset retirement obligations at end of period	$	7,516	$	12,130

- 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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