Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Current:
Federal	$ 6,711	$ 5,749	$ (12,771)
State	806	199	(774)
Foreign	10,519	7,740	1,053
Current income tax expense (benefit), Total	18,036	13,688	(12,492)
Deferred:
Federal	(812)	901	6,434
State	34	217	57
Foreign	(10)	(84)	494
Deferred income tax expense (benefit), Total	(788)	1,034	6,985
Income tax expense (benefit), continuing operations, Total	$ 17,248	$ 14,722	$ (5,507)