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Commitments And Contingencies (Narrative) (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 01, 2020 | Sep. 30, 2020 | Dec. 31, 2020
Commitments And Contingencies [Abstract] |  |  |
Litigation settlement amount |  |  | $ 25,000
Settlement amount paid | $ 10,000 | $ 15,000 |
Loss contingency accrual |  |  | $ 53,242

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