Income Taxes (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Federal:
Current	$ 5,466	$ 8,173	$ 196
Deferred	6,538	911	1,145
State:
Current	2,911	2,360	421
Deferred	376		253
Foreign:
Current	6,818	7,316	1,851
Deferred	(260)	631	1,469
Income Tax Expense (Benefit), Total	$ 21,849	$ 19,391	$ 5,335