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Asset Retirement Obligation (Tables)

12 Months Ended

Dec. 31, 2012

Information Related to Asset Retirement Obligation

The following table reflects information related to our asset retirement obligations:

Balance at December 31, 2010		$	173,673
Additions to asset retirement obligations			708
Accretion expense			10,573
Liabilities settled			(4,292	)
Balance at December 31, 2011			180,662
Additions to asset retirement obligations			5,434
Accretion expense			10,871
Liabilities settled			(7,308	)
Balance at December 31, 2012		$	189,659

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- Definition

Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 410

-SubTopic 30

-Section 50

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13201-110859

+ Details

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