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Allowance for Loan Losses (Impaired Loans By Class) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance $ 9,453 $ 12,495  
Recorded Investment 8,590 11,445  
Related Allowance 962 458  
Average Recorded Investment 8,898 11,642 $ 13,700
Interest Income Recognized 383 322 $ 415
Consumer Installment [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 0 34  
Recorded Investment 0 34  
Related Allowance 0 9  
Average Recorded Investment 0 36  
Interest Income Recognized 0 1  
Commercial [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 1,535 1,221  
Recorded Investment 1,316 860  
Related Allowance 650 195  
Average Recorded Investment 1,485 909  
Interest Income Recognized 85 40  
Commercial Real Estate [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 2,976 1,941  
Recorded Investment 2,926 1,907  
Related Allowance 193 59  
Average Recorded Investment 2,965 1,938  
Interest Income Recognized 105 72  
Construction And Farmland [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 332 362  
Recorded Investment 281 316  
Related Allowance 0 0  
Average Recorded Investment 297 330  
Interest Income Recognized 27 28  
Residential [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 4,610 8,937  
Recorded Investment 4,067 8,328  
Related Allowance 119 195  
Average Recorded Investment 4,151 8,429  
Interest Income Recognized 166 181  
All Other Loans [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 0 0  
Recorded Investment 0 0  
Related Allowance 0 0  
Average Recorded Investment 0 0  
Interest Income Recognized   0  
With No Related Allowance [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 4,822 9,519  
Recorded Investment 4,015 8,728  
Average Recorded Investment 4,177 8,889  
Interest Income Recognized 171 211  
With No Related Allowance [Member] | Commercial - Non Real Estate Commercial And Industrial [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 564 626  
Recorded Investment 356 304  
Average Recorded Investment 422 342  
Interest Income Recognized 25 23  
With No Related Allowance [Member] | Commercial Real Estate Owner Occupied [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 0 330  
Recorded Investment 0 331  
Average Recorded Investment 0 336  
Interest Income Recognized 0 15  
With No Related Allowance [Member] | Commercial Real Estate Non-Owner Occupied [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 558 805  
Recorded Investment 501 767  
Average Recorded Investment 511 785  
Interest Income Recognized 4 20  
With No Related Allowance [Member] | Construction And Farmland Residential [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 0 0  
Recorded Investment   0  
Average Recorded Investment 0 0  
Interest Income Recognized 0 0  
With No Related Allowance [Member] | Construction And Farmland Commercial [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 332 362  
Recorded Investment 281 316  
Average Recorded Investment 297 330  
Interest Income Recognized 27 28  
With No Related Allowance [Member] | Consumer Installment [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 0 25  
Recorded Investment 0 25  
Average Recorded Investment 0 27  
Interest Income Recognized 0 1  
With No Related Allowance [Member] | Residential Equity Lines [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 468 0  
Recorded Investment 92 0  
Average Recorded Investment 93 0  
Interest Income Recognized 0 0  
With No Related Allowance [Member] | Residential Single Family [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 2,616 7,371  
Recorded Investment 2,499 6,985  
Average Recorded Investment 2,565 7,069  
Interest Income Recognized 101 124  
With No Related Allowance [Member] | Residential Multifamily [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 284 0  
Recorded Investment 286 0  
Average Recorded Investment 289 0  
Interest Income Recognized 14 0  
With No Related Allowance [Member] | All Other Loans [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance   0  
Recorded Investment   0  
Average Recorded Investment   0  
Interest Income Recognized   0  
With An Allowance Recorded [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 4,631 2,976  
Recorded Investment 4,575 2,717  
Related Allowance 962 458  
Average Recorded Investment 4,721 2,753  
Interest Income Recognized 212 111  
With An Allowance Recorded [Member] | Commercial - Non Real Estate Commercial And Industrial [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 971 595  
Recorded Investment 960 556  
Related Allowance 650 195  
Average Recorded Investment 1,063 567  
Interest Income Recognized 60 17  
With An Allowance Recorded [Member] | Commercial Real Estate Owner Occupied [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 0 0  
Recorded Investment 0 0  
Related Allowance 0 0  
Average Recorded Investment 0 0  
Interest Income Recognized 0 0  
With An Allowance Recorded [Member] | Commercial Real Estate Non-Owner Occupied [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 2,418 806  
Recorded Investment 2,425 809  
Related Allowance 193 59  
Average Recorded Investment 2,454 817  
Interest Income Recognized 101 37  
With An Allowance Recorded [Member] | Construction And Farmland Residential [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 0 0  
Recorded Investment 0 0  
Related Allowance 0 0  
Average Recorded Investment 0 0  
Interest Income Recognized 0 0  
With An Allowance Recorded [Member] | Construction And Farmland Commercial [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 0 0  
Recorded Investment 0 0  
Related Allowance 0 0  
Average Recorded Investment 0 0  
Interest Income Recognized 0 0  
With An Allowance Recorded [Member] | Consumer Installment [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 0 9  
Recorded Investment 0 9  
Related Allowance 0 9  
Average Recorded Investment 0 9  
Interest Income Recognized 0 0  
With An Allowance Recorded [Member] | Residential Equity Lines [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 0 217  
Recorded Investment 0 44  
Related Allowance 0 44  
Average Recorded Investment 0 45  
Interest Income Recognized 0 0  
With An Allowance Recorded [Member] | Residential Single Family [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 1,242 1,349  
Recorded Investment 1,190 1,299  
Related Allowance 119 151  
Average Recorded Investment 1,204 1,315  
Interest Income Recognized 51 57  
With An Allowance Recorded [Member] | Residential Multifamily [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 0 0  
Recorded Investment 0 0  
Related Allowance 0 0  
Average Recorded Investment 0 0  
Interest Income Recognized 0 0  
With An Allowance Recorded [Member] | All Other Loans [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 0 0  
Recorded Investment 0 0  
Related Allowance 0 0  
Average Recorded Investment 0 0  
Interest Income Recognized $ 0 $ 0