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Fair Value Measurements (Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |
Pension plan assets | $ 59,189 | $ 61,939
Contingent consideration | 4,463 | 4,609
Level 1 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |
Pension plan assets | 0 | 0
Contingent consideration | 0 | 0
Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |
Pension plan assets |  | 0
Contingent consideration | 0 | 0
Level 2 | Recurring |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |
Pension plan assets | 0 |
Level 3 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |
Pension plan assets |  | 61,939
Contingent consideration | 4,463 | $ 4,609
Level 3 | Recurring |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |
Pension plan assets | $ 59,189 |

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