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Repurchase Agreements and Other Borrowings (Details) (USD $)
6 Months Ended
Jun. 30, 2012
Feb. 11, 2011
May 13, 2011
Series C Convertible Preferred Stock [Member]
Mar. 02, 2011
Series C Convertible Preferred Stock [Member]
Repurchase Agreements and Other Borrowings [Abstract]        
Securities Sold under Agreements to Repurchase Increase (Decrease) $ 14,400,000      
Federal Home Loan Bank Advances Short and Long Term, Increase (Decrease) 10,000,000      
Number of Federal Home Loan Bank, Advances, Maturities 2      
Class of Stock [Line Items]        
Preferred Stock, shares subscribed, value   $ 27,500,000    
Number of Investors Completing the Required Bank Regulatory Process     4 3