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Other Borrowings (Summary Of Short Term Borrowings) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Short Term [Member] |  |
Short-term Debt [Line Items] |  |
Balance at end of year |  |
Maximum month-end outstanding balance |  | 6,265
Average outstanding balance during the year | $ 1 | $ 371
Average interest rate during the year | 0.00% | 1.08%
Reverse Repurchase Agreements [Member] |  |
Short-term Debt [Line Items] |  |
Maximum month-end outstanding balance | $ 5,000 |
Average outstanding balance during the year | $ 795 |
Average interest rate during the year | 1.76% |

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