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Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Mar. 31, 2020 | Dec. 31, 2020 | Nov. 30, 2020 | Dec. 31, 2019
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |  |
Indefinite-life intangible assets, net carrying value |  | $ 321,475 |  | $ 352,275
Trade Names |  |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |  |
Impairment charge | $ 30,800 |  |  |
Percentage of fair value in excess of carrying amount |  |  | 3.00% |
Indefinite-life intangible assets, net carrying value |  | $ 318,700 |  |

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