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Other Borrowings - Assets Pledged As Collateral With FRB (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Assets pledged as collateral with the FRB $ 30,581 $ 26,052
Commercial Loan [Member]
   
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Assets pledged as collateral with the FRB 12,326 9,352
Commercial Real Estate [Member]
   
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Assets pledged as collateral with the FRB $ 18,255 $ 16,700