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Employee Benefit Plans (Summary Of Assets Segregated By Level Of Valuation Inputs Within The Fair Value Hierarchy) (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total | $ 14,704 | $ 12,629 | $ 11,884
Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total | 11,874 | 10,247 |
Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total | 2,830 | 2,382 |
Level 3 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total | 0 | 0 |
Cash and Cash Equivalents |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total | 39 | 146 |
Cash and Cash Equivalents | Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total | 39 | 146 |
Cash and Cash Equivalents | Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total | 0 | 0 |
Cash and Cash Equivalents | Level 3 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total | 0 | 0 |
US Government Agencies Debt Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total |  | 100 |
US Government Agencies Debt Securities | Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total |  | 0 |
US Government Agencies Debt Securities | Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total |  | 100 |
US Government Agencies Debt Securities | Level 3 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total |  |  |
Common stocks |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total | 11,835 | 10,101 |
Common stocks | Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total | 11,835 | 10,101 |
Common stocks | Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total | 0 | 0 |
Common stocks | Level 3 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total | 0 | 0 |
Corporate Bond Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total | 2,830 | 2,282 |
Corporate Bond Securities | Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total | 0 | 0 |
Corporate Bond Securities | Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total | 2,830 | 2,282 |
Corporate Bond Securities | Level 3 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total | $ 0 | $ 0 |

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