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Asset Retirement Obligations

12 Months Ended

Dec. 31, 2011

Asset Retirement Obligations [Abstract]

Asset Retirement Obligations

14. Asset Retirement Obligations

Our asset retirement obligations are related primarily to past TEL operations. The following table illustrates the 2011, 2010, and 2009 activity associated with our asset retirement obligations.

		Years Ended December 31
		2011				2010				2009
Asset retirement obligations, beginning of year		$	2,975			$	3,031			$	3,009
Liabilities incurred			100				0				2,000
Accretion expense			165				139				168
Liabilities settled			0				0				(1,539	)
Changes in expected cash flows and timing			57				(195	)			(607	)
Asset retirement obligations, end of year		$	3,297			$	2,975			$	3,031

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- 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.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 143

-Paragraph 22

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 410

-SubTopic 20

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7569-110849



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 410

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849

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