Income Taxes (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current:
Federal	$ (272)	$ (4,643)	$ (9,286)
State	2,189	1,292	677
Foreign	7,652	8,163	9,607
Total current income tax expense (benefit)	9,569	4,812	998
Deferred:
Federal	11,127	992	3,212
State	40	(1,560)	(939)
Foreign	107	(356)	(1,529)
Total deferred income tax expense (benefit)	11,274	(924)	744
Income tax expense	$ 20,843	$ 3,888	$ 1,742