Income Taxes (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current tax provision: (benefit)
U.S. federal	$ (7,050)	$ 4,020	$ 1,690
State	2,182	6,552	3,157
Foreign	35,238	28,000	55,837
Total current	30,370	38,572	60,684
Deferred tax provision (benefit):
U.S. federal	(71,947)	(72,014)	(83,763)
State	(5,043)	(7,874)	(10,110)
Foreign	(15,755)	30,711	(29,113)
Total deferred	(92,745)	(49,177)	(122,986)
Provision for (benefit from) income taxes	$ (62,375)	$ (10,605)	$ (62,302)