Income Taxes (Provision (Benefit) for Income Taxes) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Current Income Tax Expense (Benefit) [Abstract]
Federal	$ 3,021	$ (717)	$ (1,281)
State	1,596	232	791
Foreign	5,424	2,638	2,267
Current income tax expense (benefit)	10,041	2,153	1,777
Deferred income tax expense (benefit)	(13,098)	13,158	4,241
Provision (benefit) for income taxes	$ (3,057)	$ 15,311	$ 6,018