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Loans (Details Textual) (USD $)
 1 Months Ended 6 Months Ended
Jan. 31, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Loans (Additional Textual) [Abstract]        
Residential mortgage loan   $ 32,700,000   $ 67,400,000
Percentage of delinquent loan 2.85%      
Delinquent loans least percentage     0.64%  
Delinquent loans past dues Percentage   1.10%    
Impaired loans classified as troubled debt restructured   $ 207,000   $ 207,000
Maximum time for re-evaluation (in months)   12 months    
Unsecured consumer loans, credit card credits and overdraft lines of credit reach   90 days    
Re-evaluation period for real estate   2 years    
Delinquent period for charging down consumer loans   120 days    
Delinquent period for charging down commercial and agricultural credits   120 days    
Maximum [Member]
        
Loans (Textual) [Abstract]        
Leverage position of balance sheet   150.00%    
Leverage position of customers   200.00%    
Minimum [Member]
        
Loans (Textual) [Abstract]        
Repayment period of loan with a reasonable reduction of principal balance   2 years