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Investment Securities - Textual (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Schedule of Available-for-sale Securities          
Gross realized gains $ 253,433 $ 1,300,000 $ 575,573 $ 1,600,000  
Gross realized losses 0 0 46,589 0  
Investment securities pledged as collateral 82,154,489   82,154,489   88,652,919
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities     0    
Government sponsored agencies - Collateralized mortgage obligations
         
Schedule of Available-for-sale Securities          
Fair Value 69,492,000   69,492,000   122,593,000
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions 1   1   3
Mortgage-backed, pass-through securities
         
Schedule of Available-for-sale Securities          
Fair Value 118,568,000   118,568,000   107,257,000
Collateralized Mortgage Obligations
         
Schedule of Available-for-sale Securities          
Fair Value $ 80,900,000   $ 80,900,000   $ 123,600,000