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Nature Of Operations And Accounting Policies (Schedule Of Future Amortization Expense Of Intangible Assets) (Details)
$ in Thousands
Dec. 31, 2020
USD ($)
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]  
2021 $ 4,215
2022 3,510
2023 3,496
2024 3,477
2025 2,485
Years subsequent to 2025 2,940
Total $ 20,123