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Commitments and Contingencies (Details 1) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Summary of the Bank's commitments and contingent liabilities    
Commitments to extend credit      
Commercial loans [Member]
   
Summary of the Bank's commitments and contingent liabilities    
Commitments to extend credit 133,953 123,517
Consumer loans [Member]
   
Summary of the Bank's commitments and contingent liabilities    
Commitments to extend credit 369,110 369,467
Real estate mortgage loans [Member]
   
Summary of the Bank's commitments and contingent liabilities    
Commitments to extend credit 27,388 27,959
Real estate construction loans [Member]
   
Summary of the Bank's commitments and contingent liabilities    
Commitments to extend credit 28,711 36,311
Standby letters of credit [Member]
   
Summary of the Bank's commitments and contingent liabilities    
Commitments to extend credit 2,004 2,905
Deposit account overdraft privilege [Member]
   
Summary of the Bank's commitments and contingent liabilities    
Commitments to extend credit $ 71,288 $ 69,675