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Fair Value Measurements (Schedule Of Level 2 Financial Assets And Liabilities Measured On A Recurring Basis) (Details) - Impaired Loans - Fair Value, Measurements, Nonrecurring - Level 3 - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018
Fair Value Measurement On Nonrecurring Basis Asset And Liabilities Value [Roll Forward] |  |
Beginning balance | $ 10,078 | $ 9,020
Loans classified as impaired during the period | 0 | 0
Specific valuation allowance allocations | 0 | 0
Fair Value | 0 | 0
Reduction in (additional) specific valuation allowance allocations | 74 | (474)
Paydowns, payoffs, other activity | (684) | 888
Ending balance | $ 9,468 | $ 9,434

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