Income Taxes (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Unrecognized tax benefits at beginning of the year	$ 1,418	$ 2,218	$ 2,218
Additions related to current year tax positions	0	0	0
Additions related to prior year tax positions	0	0	0
Settlements	0	0	0
Reductions due to lapse of statute of limitations	(1,418)	(800)	0
Unrecognized tax benefits at end of the year	$ 0	$ 1,418	$ 2,218