Income Taxes (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Unrecognized tax benefits
Liability for gross unrecognized tax benefits	$ 318	$ 129
Unrecognized tax benefits which if recognized will affect the entity's effective tax rate	207	84
Accrued interest and penalties	18	19
Company's summary of accounting for tax uncertainties
Balance at the beginning of the period	129	3,164
Additions related to prior year positions	218	100
Reductions related to prior year positions	0	(450)
Reductions due to settlements	0	(1,878)
Reductions due to expiration of the statute of limitations	(29)	(807)
Balance at the end of the period	$ 318	$ 129