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Troubled Debt Restructurings (Details Textual) (USD $)
3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2013
Jun. 30, 2012
Loans
Jun. 30, 2013
Jun. 30, 2012
Loans
Dec. 31, 2012
Troubled Debt Restructuring (Additional Textual) [Abstract]          
Total troubled debt restructurings     $ 7,400,000   $ 7,600,000
Specific reserves to customers     108,000   155,000
Commitments to lend additional amounts to borrowers classified as troubled debt restructurings     16,000   0
Allowance adjustment charge offs     16,000    
Increase in the allowance for loan losses as a result of the allowance     3,000    
Payment default loan period due to borrower death 12 months        
Loans modified as trouble debt restructuring loan   2   2  
Decrease in allowance for loan losses   $ 416,000   $ 416,000  
Minimum
         
[TroubledDebtRestructuringTextualAbstract]          
Reduction of the notes stated interest rate     0.25%    
Maturity period of loans     3 months    
Maximum
         
[TroubledDebtRestructuringTextualAbstract]          
Reduction of the notes stated interest rate     3.25%    
Maturity period of loans     126 months