Investment Securities - Textual (Details) (USD $)	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Schedule of Available-for-sale Securities
Gross realized gains	$ 0
Gross realized losses	0	0
Investment securities pledged as collateral	84,814,747		88,652,919
Mortgage-backed, pass-through securities
Schedule of Available-for-sale Securities
Fair Value	132,424,000		107,257,000
Collateralized Mortgage Obligations
Schedule of Available-for-sale Securities
Fair Value	$ 115,600,000		$ 123,600,000

Amount of debt securities categorized neither as held-to-maturity nor trading.

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Reference 9: http://www.xbrl.org/2003/role/presentationRef

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