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Loans (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans, net of unearned income $ 896,210 $ 883,764
Commercial [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans, net of unearned income 160,918 171,529
Commercial loans secured by real estate [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans, net of unearned income 469,348 446,598
Real estate-mortgage [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans, net of unearned income 246,881 245,765
Consumer [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans, net of unearned income $ 19,063 $ 19,872