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Securities (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2012 Contract	Dec. 31, 2011 Contract	Dec. 31, 2010
Securities (Textual) [Abstract]
Number of U.S. agency and mortgage-backed securities	12	3
Number of obligation of state and political subdivisions in an unrealized loss position	9
Percentage of investment portfolio	100.00%	100.00%
Weighted-average period of re-pricing of portfolio	3 years 7 months 6 days	3 years 3 months 18 days
Proceeds from maturities, calls, and principal payments of securities available for sale	$ 36,300,000	$ 14,900,000	$ 4,400,000
Gross realized gains on securities available for sale	1,300,000	65,000	13,000
Gross realized losses on securities available for sale	0	6,000	20,000
Securities book value	24,000,000	25,300,000
Impairment recognized	$ 0

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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