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Income Taxes (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Current tax provision: (benefit)
U.S. federal	$ 4,029	$ 1,691	$ (2,906)
State	6,552	3,157	2,296
Foreign	27,309	56,623	58,842
Total current	37,890	61,471	58,232
Deferred tax provision (benefit):
U.S. federal	(71,857)	(83,752)	903
State	(7,874)	(10,110)	(4,193)
Foreign	28,376	(34,215)	(3,275)
Total deferred	(52,389)	(129,259)	(6,684)
Provision for (benefit from) income taxes	$ (13,465)	$ (66,606)	$ 51,667

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