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Loans and the Allowance for Loan Losses (Loans Receivable on Non-Accrual Status) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]    
Financing Receivable, Recorded Investment, Nonaccrual Status $ 2,032 $ 3,618
Commercial and industrial [Member]
   
Financing Receivable, Allowance for Credit Losses [Line Items]    
Financing Receivable, Recorded Investment, Nonaccrual Status 85 216
Commercial real estate [Member]
   
Financing Receivable, Allowance for Credit Losses [Line Items]    
Financing Receivable, Recorded Investment, Nonaccrual Status 175 354
Construction [Member]
   
Financing Receivable, Allowance for Credit Losses [Line Items]    
Financing Receivable, Recorded Investment, Nonaccrual Status 0 319
Residential mortgage [Member]
   
Financing Receivable, Allowance for Credit Losses [Line Items]    
Financing Receivable, Recorded Investment, Nonaccrual Status $ 1,772 $ 2,729