Income Taxes (Components of Income Tax Provision) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current:
Federal	$ 12,072	$ 4,550	$ (2,729)
State	1,450	1,211	137
Foreign	891	883	658
Total current	14,413	6,644	(1,934)
Deferred:
Federal	(18,836)	1,107	(3,499)
State	90	111	(112)
Total deferred	(18,746)	1,218	(3,611)
Income tax (benefit) expense	$ (4,333)	$ 7,862	$ (5,545)