Income Taxes Provision for Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current:
Federal									$ 0	$ 0	$ 179
State taxes									113	281	943
Foreign taxes									4,405	11,890	7,586
Total current									4,518	12,171	8,708
Deferred:
Federal									(26,151)	10,085	0
State taxes									(325)	(196)	0
Total deferred									(26,476)	9,889	0
(Provision) benefit for income taxes	$ 3,390	$ (19,570)	$ (9,050)	$ 3,272	$ 5,757	$ (1,938)	$ 3,494	$ 14,747	$ (21,958)	$ 22,060	$ 8,708