Income Taxes (Provision (Benefit) for Income Taxes) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current Income Tax Expense (Benefit) [Abstract]
Federal	$ 503	$ 3,021	$ (717)
State	374	1,596	232
Foreign	5,176	5,424	2,638
Current income tax expense (benefit)	6,053	10,041	2,153
Deferred income tax expense (benefit)	12,946	(13,098)	13,158
Provision (benefit) for income taxes	$ 18,999	$ (3,057)	$ 15,311