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Fair Value Measurements (Schedule Of Assets And Liabilities Measured At Fair Value On A Recurring And Nonrecurring Basis) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Asset write down | $ 297 | $ 491 | $ 0
Impaired loans |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Provision For Loan Losses on Impaired Loans During Period | (87) | (428) |
Other real estate owned |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Write-downs included in other non-interest expense | (470) | (838) |
Fair Value, Recurring [Member] | U.S. Government agencies |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | 502 | 5,733 |
Fair Value, Recurring [Member] | U.S. Government agencies | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | 502 | 5,733 |
Fair Value, Recurring [Member] | Obligations of states and political subdivisions |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | 117,187 | 128,070 |
Fair Value, Recurring [Member] | Obligations of states and political subdivisions | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | 117,187 | 128,070 |
Fair Value, Recurring [Member] | U.S. Government agencies |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | 642,104 | 550,758 |
Fair Value, Recurring [Member] | U.S. Government agencies | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | 642,104 | 550,758 |
Fair Value, Recurring [Member] | Private label |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | 11,485 | 12,043 |
Fair Value, Recurring [Member] | Private label | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | 11,485 | 12,043 |
Fair Value, Recurring [Member] | Trust preferred securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | 4,461 | 4,799 |
Fair Value, Recurring [Member] | Trust preferred securities | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | 4,461 | 4,538 |
Fair Value, Recurring [Member] | Trust preferred securities | Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure |  | 261 |
Fair Value, Recurring [Member] | Corporate securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | 32,126 | 16,658 |
Fair Value, Recurring [Member] | Corporate securities | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | 32,126 | 16,658 |
Fair Value, Recurring [Member] | Equity Securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | 12,634 | 11,771 |
Fair Value, Recurring [Member] | Equity Securities | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | 7,787 | 7,365 |
Fair Value, Recurring [Member] | Equity Securities | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | 4,847 | 4,406 |
Fair Value, Recurring [Member] | Certificates of Deposit |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | 2,241 | 3,735 |
Fair Value, Recurring [Member] | Certificates of Deposit | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | 2,241 | 3,735 |
Fair Value, Recurring [Member] | Derivative assets |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | 19,310 | 17,100 |
Fair Value, Recurring [Member] | Derivative assets | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | 19,310 | 17,100 |
Fair Value, Recurring [Member] | Derivative liabilities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Financial and Nonfinancial Liabilities, Fair Value Disclosure | 19,380 | 16,905 |
Fair Value, Recurring [Member] | Derivative liabilities | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Financial and Nonfinancial Liabilities, Fair Value Disclosure | 0 | 0 |
Fair Value, Recurring [Member] | Derivative liabilities | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Financial and Nonfinancial Liabilities, Fair Value Disclosure | 19,380 | 16,905 |
Fair Value, Recurring [Member] | Derivative liabilities | Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Financial and Nonfinancial Liabilities, Fair Value Disclosure | 0 | 0 |
Fair Value, Nonrecurring [Member] | Impaired loans |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | 8,925 | 10,078 |
Fair Value, Nonrecurring [Member] | Impaired loans | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | 0 | 0 |
Fair Value, Nonrecurring [Member] | Impaired loans | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | 0 | 0 |
Fair Value, Nonrecurring [Member] | Impaired loans | Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | 8,925 | 10,078 |
Fair Value, Nonrecurring [Member] | Other real estate owned |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | 4,670 | 4,608 |
Fair Value, Nonrecurring [Member] | Other real estate owned | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | 0 | 0 |
Fair Value, Nonrecurring [Member] | Other real estate owned | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | 0 | 0 |
Fair Value, Nonrecurring [Member] | Other real estate owned | Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | 4,670 | 4,608 |
Fair Value, Nonrecurring [Member] | Other Assets |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | 100 | 600 |
Fair Value, Nonrecurring [Member] | Other Assets | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | 0 | 0 |
Fair Value, Nonrecurring [Member] | Other Assets | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | 0 | 0 |
Fair Value, Nonrecurring [Member] | Other Assets | Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure | $ 100 | $ 600 |

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