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Loans (Schedule Of Impaired Loans) (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2017
Dec. 31, 2016
Total loans    
Financing Receivable, Impaired [Line Items]    
Unpaid Principal Balance $ 46,679 $ 57,173
Recorded Investment With Allowance 7,826 10,344
Recorded Investment Without Allowance 36,147 42,751
Total Recorded Investment 43,973 53,095
Related Allowance 747 1,412
Average Recorded Investment 44,183 51,455
Interest Income Recognized 2,926 2,320
Commercial real estate, construction    
Financing Receivable, Impaired [Line Items]    
Unpaid Principal Balance 821 894
Recorded Investment With Allowance 0 0
Recorded Investment Without Allowance 776 866
Total Recorded Investment 776 866
Related Allowance 0 0
Average Recorded Investment 805 913
Interest Income Recognized 0 3
Commercial real estate    
Financing Receivable, Impaired [Line Items]    
Unpaid Principal Balance 15,109 20,029
Recorded Investment With Allowance 5,045 7,474
Recorded Investment Without Allowance 9,180 12,227
Total Recorded Investment 14,225 19,701
Related Allowance 136 803
Average Recorded Investment 14,763 18,710
Interest Income Recognized 727 700
Commercial real estate    
Financing Receivable, Impaired [Line Items]    
Unpaid Principal Balance 15,930 20,923
Recorded Investment With Allowance 5,045 7,474
Recorded Investment Without Allowance 9,956 13,093
Total Recorded Investment 15,001 20,567
Related Allowance 136 803
Average Recorded Investment 15,568 19,623
Interest Income Recognized 727 703
Commercial and industrial    
Financing Receivable, Impaired [Line Items]    
Unpaid Principal Balance 2,794 7,289
Recorded Investment With Allowance 2,016 2,732
Recorded Investment Without Allowance 603 1,003
Total Recorded Investment 2,619 3,735
Related Allowance 424 585
Average Recorded Investment 2,651 3,386
Interest Income Recognized 384 125
Residential real estate    
Financing Receivable, Impaired [Line Items]    
Unpaid Principal Balance 25,974 27,703
Recorded Investment With Allowance 654 138
Recorded Investment Without Allowance 23,724 27,393
Total Recorded Investment 24,378 27,531
Related Allowance 151 24
Average Recorded Investment 24,273 27,455
Interest Income Recognized 1,675 1,419
Home equity lines of credit    
Financing Receivable, Impaired [Line Items]    
Unpaid Principal Balance 1,718 908
Recorded Investment With Allowance 65 0
Recorded Investment Without Allowance 1,649 908
Total Recorded Investment 1,714 908
Related Allowance 13 0
Average Recorded Investment 1,435 717
Interest Income Recognized 122 44
Consumer, indirect    
Financing Receivable, Impaired [Line Items]    
Unpaid Principal Balance 171 220
Recorded Investment With Allowance 18 0
Recorded Investment Without Allowance 154 224
Total Recorded Investment 172 224
Related Allowance 2 0
Average Recorded Investment 155 136
Interest Income Recognized 11 16
Consumer, other    
Financing Receivable, Impaired [Line Items]    
Unpaid Principal Balance 92 130
Recorded Investment With Allowance 28 0
Recorded Investment Without Allowance 61 130
Total Recorded Investment 89 130
Related Allowance 21 0
Average Recorded Investment 101 138
Interest Income Recognized 7 13
Consumer, other    
Financing Receivable, Impaired [Line Items]    
Unpaid Principal Balance 263 350
Recorded Investment With Allowance 46 0
Recorded Investment Without Allowance 215 354
Total Recorded Investment 261 354
Related Allowance 23 0
Average Recorded Investment 256 274
Interest Income Recognized $ 18 $ 29