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TARP Repurchase (Details) (USD $)
 6 Months Ended
Jun. 30, 2012
Dec. 31, 2011
TARP Repurchase [Abstract]    
Number of shares of preferred stock repurchased (in shares) 12,530  
Preferred stock, shares outstanding (in shares) 12,524 25,054
Purchase price per share (in dollars per share) $ 933.36  
Total purchase price $ 11,778,575.90  
Accrued and unpaid dividends on preferred stock included in total purchase price 83,575.10  
Number of shares retired (in shares) 12,530  
Difference between book value and purchase price of preferred stock retired 834,999.20  
Face value of preferred stock retired 12,530,000  
Treasury stock, retired, purchase price $ 11,695,000.80