Income Taxes (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Federal:
Current	$ 5,167	[1]	$ 7,406	[1]	$ (1,683)	[1]
Deferred	6,420	[1]	2,077	[1]	3,710	[1]
State:
Current	2,958	[1]	2,420	[1]	428	[1]
Deferred	376	[1]	35	[1]	257	[1]
Foreign:
Current	7,974	[1]	7,343	[1]	4,179	[1]
Deferred	(2,109)	[1]	1,021	[1]	(1,528)	[1]
Income Tax Expense (Benefit), Total	$ 20,786	[1]	$ 20,302	[1]	$ 5,363	[1]

[1] Restated