Income Taxes Schedule of Income before Tax, Domestic and Foreign (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Disclosure [Abstract]
Domestic	$ (29,483)	$ 55,537	$ 113,145
Foreign	(2,391)	3,435	3,384
(Loss) income before income tax	$ (31,874)	$ 58,972	$ 116,529