Income Taxes (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current
U.S.	$ (204)	$ 177	$ (79)
State	(357)	2,777
Foreign	(163)	173	8
Total current income tax expense (benefit)	(724)	3,127	(71)
Deferred
U.S.	(5,536)	13,223
State	(1,049)	224
Foreign	261
Total deferred income tax expense	(6,324)	13,447
Total income tax expense (benefit)	$ (7,048)	$ 16,574	$ (71)