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Intangible Asset, Net (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2012	Dec. 31, 2011
Rollforward of intangible asset
Beginning balance		$ 8,708	$ 9,843
Amortization expense		(663)	(1,135)
Intangible asset impairment	(8,045)	(8,045)
Ending balance			$ 8,708

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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