Other Indefinite-Lived Intangible Assets - Additional Information (Detail) - USD ($) |
3 Months Ended | 12 Months Ended | |
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Mar. 31, 2020 |
Dec. 31, 2020 |
Dec. 31, 2019 |
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| Goodwill And Other Intangible Assets [Line Items] | |||
| Impairment of intangible assets, indefinite-lived (excluding goodwill) | $ 17,254,000 | $ 2,925,000 | |
| Goodwill and Mastheads [Member] | |||
| Goodwill And Other Intangible Assets [Line Items] | |||
| Impairment of intangible assets, indefinite-lived (excluding goodwill) | $ 300,000 | $ 17,300 | |
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- Definition Goodwill And Other Intangible Assets No definition available.
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- Definition Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Details
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