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Loans and Allowance for Loan and Lease Losses (Impaired Loans by Loan Portfolio Class) (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Commercial Portfolio [Member] | Commercial and Industrial [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with Allowance: Recorded Investment $ 879 $ 113
Impaired Loans with Allowance: Unpaid Principal Balance 884 128
Impaired Loans with Allowance: Related Allowance 828 51
Impaired Loans: Total Recorded Investment 885 127
Impaired Loans: Total Unpaid Principal Balance 926 177
Commercial Portfolio [Member] | Commercial and Industrial [Member] | Excluded Acquired with Credit Deterioration [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Recorded Investment 6 14
Impaired Loans with No Allowance: Unpaid Principal Balance 42 49
Commercial Portfolio [Member] | Commercial Real Estate [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with Allowance: Recorded Investment 2,625 1,947
Impaired Loans with Allowance: Unpaid Principal Balance 2,702 1,981
Impaired Loans with Allowance: Related Allowance 764 429
Impaired Loans: Total Recorded Investment 4,370 3,901
Impaired Loans: Total Unpaid Principal Balance 5,499 4,932
Commercial Portfolio [Member] | Commercial Real Estate [Member] | Excluded Acquired with Credit Deterioration [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Recorded Investment 773 1,023
Impaired Loans with No Allowance: Unpaid Principal Balance 1,825 2,020
Commercial Portfolio [Member] | Commercial Real Estate [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Recorded Investment 972 931
Impaired Loans with No Allowance: Unpaid Principal Balance 972 931
Consumer Portfolio [Member] | Residential Mortgage [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with Allowance: Recorded Investment   32
Impaired Loans with Allowance: Unpaid Principal Balance   32
Impaired Loans with Allowance: Related Allowance   23
Impaired Loans: Total Recorded Investment 1,227 1,761
Impaired Loans: Total Unpaid Principal Balance 1,264 1,866
Consumer Portfolio [Member] | Residential Mortgage [Member] | Excluded Acquired with Credit Deterioration [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Recorded Investment 847 1,329
Impaired Loans with No Allowance: Unpaid Principal Balance 884 1,434
Consumer Portfolio [Member] | Residential Mortgage [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Recorded Investment 380 400
Impaired Loans with No Allowance: Unpaid Principal Balance 380 400
Consumer Portfolio [Member] | Home Equity [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with Allowance: Recorded Investment 30  
Impaired Loans with Allowance: Unpaid Principal Balance 49  
Impaired Loans with Allowance: Related Allowance 2  
Impaired Loans: Total Recorded Investment 90 115
Impaired Loans: Total Unpaid Principal Balance 122 137
Consumer Portfolio [Member] | Home Equity [Member] | Excluded Acquired with Credit Deterioration [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Allowance: Recorded Investment 60 115
Impaired Loans with No Allowance: Unpaid Principal Balance $ 73 $ 137