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Allowance for Loan Losses (Rollforward of the Allowance for Loan Losses by Portfolio Segment) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Balance at beginning of period $ 9,717 $ 10,150 $ 9,623 $ 10,104
Charge-offs (373) (633) (863) (902)
Recoveries 128 $ 65 262 380
Provision (Credit) 300 750  
Balance at end of period 9,772 $ 9,582 9,772 9,582
Commercial [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Balance at beginning of period 3,171 $ 3,254 3,262 2,844
Charge-offs (35) (156) (72)
Recoveries 21 $ 6 35 111
Provision (Credit) (47) 35 (31) 412
Balance at end of period 3,110 3,295 3,110 3,295
Commercial loans secured by real estate [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Balance at beginning of period 4,140 4,475 3,902 4,885
Charge-offs (235) (506) (250) (572)
Recoveries 3 24 54 196
Provision (Credit) 113 (78) 315 (594)
Balance at end of period 4,021 3,915 4,021 3,915
Real estate-mortgage [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Balance at beginning of period 1,321 1,301 1,310 1,260
Charge-offs (85) (103) (376) (176)
Recoveries 98 29 153 54
Provision (Credit) 58 115 305 204
Balance at end of period 1,392 1,342 1,392 1,342
Consumer [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Balance at beginning of period 201 145 190 136
Charge-offs (18) (24) (81) (82)
Recoveries 6 6 20 19
Provision (Credit) 88 24 148 78
Balance at end of period 277 151 277 151
Allocation for general risk [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Balance at beginning of period $ 884 $ 975 $ 959 $ 979
Charge-offs
Recoveries
Provision (Credit) $ 88 $ (96) $ 13 $ (100)
Balance at end of period $ 972 $ 879 $ 972 $ 879