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Allowance For Loan Losses (Schedule Of Troubled Debt Restructurings) (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
contract
Dec. 31, 2018
USD ($)
contract
Dec. 31, 2017
USD ($)
contract
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Troubled Debt Restructurings $ 29,630 $ 34,854  
Troubled Debt Restructuring Modifications Number Of Contracts | contract 41 43 48,000
Pre-modification Outstanding Recorded Investment $ 3,498 $ 2,600 $ 7,356
Post-modification Outstanding Recorded Investment 3,498 2,600 $ 7,261
Commercial and industrial      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Troubled Debt Restructurings $ 0 $ 98  
Troubled Debt Restructuring Modifications Number Of Contracts | contract 0 0 0
Pre-modification Outstanding Recorded Investment $ 0 $ 0 $ 0
Post-modification Outstanding Recorded Investment 0 0 $ 0
Commercial real estate      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Troubled Debt Restructurings $ 4,973 $ 8,205  
Troubled Debt Restructuring Modifications Number Of Contracts | contract 0 0 2,000
Pre-modification Outstanding Recorded Investment $ 0 $ 0 $ 3,098
Post-modification Outstanding Recorded Investment 0 0 $ 3,003
Residential real estate      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Troubled Debt Restructurings $ 21,029 $ 23,521  
Troubled Debt Restructuring Modifications Number Of Contracts | contract 31 33 33,000
Pre-modification Outstanding Recorded Investment $ 2,531 $ 2,326 $ 3,987
Post-modification Outstanding Recorded Investment 2,531 2,326 $ 3,987
Home equity      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Troubled Debt Restructurings $ 3,628 $ 3,030  
Troubled Debt Restructuring Modifications Number Of Contracts | contract 10 10 13,000
Pre-modification Outstanding Recorded Investment $ 967 $ 274 $ 271
Post-modification Outstanding Recorded Investment 967 274 $ 271
Consumer      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Troubled Debt Restructurings $ 0 $ 0  
Troubled Debt Restructuring Modifications Number Of Contracts | contract 0 0 0
Pre-modification Outstanding Recorded Investment $ 0 $ 0 $ 0
Post-modification Outstanding Recorded Investment $ 0 $ 0 $ 0