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Loans and Allowance for Loan Losses (Details Textual) (USD $)
 12 Months Ended
Dec. 31, 2012
Securities
Loans
Dec. 31, 2011
Loans
Loans and Allowance for Loan Losses (Textual) [Abstract]    
Loans carrying value pledged as collateral $ 457,000,000  
Total Impaired loans 39,363,000 53,620,000
Interest income recognized on impaired loans accrual status 275,000 155,000
Contractual interest due on loans in non-accrual basis 1,198,000 1,952,000
Interest income recognized on loans in non-accrual basis 414,000 285,000
Borrowers delinquent once payments 30 days  
Period for payment of principal or interest 90 days  
Loans classified as troubled debt restructurings 22,363,000 32,165,000
Troubled debt restructurings on non-accrual status 14,081,000 24,948,000
Troubled debt restructurings on accrual status 8,282,000 7,217,000
Reserves allocated to allowance for loan losses $ 1,544,000 $ 1,522,000
Borrower's payment according to the modified terms 90 days  
Loans meeting the TDR criteria 14  
Number of defaulted loans modified as a TDR 1 0