Goodwill and Other Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Goodwill [Abstract]
Beginning Balance	$ 4,490	$ 4,490
Amortization	0	0
Ending Balance	4,490	4,490	4,490
Gross [Abstract]
Beginning Balance	3,343	3,343
Amortization	0	0
Ending Balance	3,343	3,343	3,343
Accumulated Amortization [Abstract]
Beginning Balance	(1,294)	(672)
Amortization	(512)	(622)	(672)
Ending Balance	(1,806)	(1,294)	(672)
Net [Abstract]
Beginning Balance	2,049	2,671
Amortization	(512)	(622)	(672)
Ending Balance	1,537	2,049	2,671
Impairment of goodwill	0	0
Summary of expected amortization expense for other intangible assets [Abstract]
2013	439
2014	366
2015	293
2016	220
2017	146
Thereafter	73
Total	$ 1,537
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life of other intangible assets	2 years
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life of other intangible assets	9 years