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Loan Quality And Allowance For Loan Losses (Impaired Financing Receivables) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Financing Receivable, Impaired [Line Items]          
Recorded Investment With No Allowance $ 13,135   $ 13,135   $ 15,067
Unpaid Principal Balance With No Allowance 13,773   13,773   15,826
Recorded Investment With Allowance    
Unpaid Principal Balance With Allowance    
Related Allowance    
Average Recorded Investment 13,192 $ 15,754 14,191 $ 19,811  
Interest Income Recognized 119 128 360 508  
Residential Real Estate [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment With No Allowance 1,195   1,195   1,041
Unpaid Principal Balance With No Allowance 1,293   1,293   1,123
Recorded Investment With Allowance    
Unpaid Principal Balance With Allowance    
Related Allowance    
Average Recorded Investment 1,211 1,292 1,237 1,352  
Interest Income Recognized 10 10 32 30  
Residential Real Estate [Member] | First Liens [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment With No Allowance 1,142   1,142   956
Unpaid Principal Balance With No Allowance 1,239   1,239   1,030
Recorded Investment With Allowance    
Unpaid Principal Balance With Allowance    
Related Allowance    
Average Recorded Investment 1,157 1,196 1,152 1,262  
Interest Income Recognized 10 10 32 30  
Residential Real Estate [Member] | Junior Liens & Lines Of Credit [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment With No Allowance 53   53   85
Unpaid Principal Balance With No Allowance 54   54   93
Recorded Investment With Allowance    
Unpaid Principal Balance With Allowance    
Related Allowance    
Average Recorded Investment 54 96 85 90  
Interest Income Recognized      
Residential Real Estate - Construction [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment With No Allowance 469   469   480
Unpaid Principal Balance With No Allowance 531   531   535
Recorded Investment With Allowance    
Unpaid Principal Balance With Allowance    
Related Allowance    
Average Recorded Investment 471 548 475 554  
Interest Income Recognized      
Commercial Real Estate [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment With No Allowance 11,180   11,180   13,523
Unpaid Principal Balance With No Allowance 11,645   11,645   14,133
Recorded Investment With Allowance    
Unpaid Principal Balance With Allowance    
Related Allowance    
Average Recorded Investment 11,218 13,889 12,216 17,871  
Interest Income Recognized 109 118 328 478  
Commercial [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment With No Allowance 291   291   23
Unpaid Principal Balance With No Allowance 304   304   35
Recorded Investment With Allowance    
Unpaid Principal Balance With Allowance    
Related Allowance    
Average Recorded Investment $ 292 25 $ 263 34  
Interest Income Recognized