Other Intangible Assets (Details) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2010	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment charge	$ 11,700,000	$ 0	$ 0	$ 11,662,000
Goodwill				0
Amortization of core deposit intangibles		117,000	122,000	129,000
Core Deposits
Finite-Lived Intangible Assets [Line Items]
Net carrying value of core deposit intangibles		72,000	189,000
Accumulated amortization		1,300,000	1,200,000
Amortization of core deposit intangibles		$ 117,000	$ 122,000	$ 129,000