Income Taxes Income Tax Expense (Benefit) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Current:
Federal	$ 3,244	$ 4,749	$ (8,310)
State	1,000	689	1,775
Foreign	13,008	9,729	10,850
Current Income Tax Expense (Benefit)	17,252	15,167	4,315
Deferred:
Federal	(3,474)	(1,696)	0
Foreign	(4,078)	(771)	1,785
Deferred Income Tax Expense (Benefit)	(7,552)	(2,467)	1,785
Income Taxes	$ 9,700	$ 12,700	$ 6,100