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Allowance For Loan Losses (Schedule Of Information Related To Average Recorded Investment And Interest Income Recognized On Impaired Loans) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Financing Receivable, Impaired [Line Items] |  |  |
With no related allowance recorded, Average recorded investment | $ 4,966 | $ 5,468 | $ 5,620
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method | 41 | 39 | 69
With an allowance recorded, Average recorded investment | 4,261 | 5,043 | 4,307
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method | 162 | 220 | 149
Commercial and industrial |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
With no related allowance recorded, Average recorded investment | 578 | 845 | 1,086
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method | 0 | 0 | 0
With an allowance recorded, Average recorded investment | 0 | 0 | 0
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method | 0 | 0 | 0
Commercial real estate |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
With no related allowance recorded, Average recorded investment | 4,388 | 4,623 | 4,534
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method | 41 | 39 | 69
With an allowance recorded, Average recorded investment | 4,261 | 5,043 | 4,307
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method | $ 162 | $ 220 | $ 149

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