Other Indefinite-Lived Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2020 |
Mar. 31, 2020 |
Sep. 30, 2019 |
Sep. 30, 2020 |
Sep. 30, 2019 |
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| Goodwill And Other Intangible Assets [Line Items] | |||||
| Impairment of intangible assets, indefinite-lived (excluding goodwill) | $ 0 | $ 1,915 | $ 17,254 | $ 1,915 | |
| Goodwill and Mastheads [Member] | |||||
| Goodwill And Other Intangible Assets [Line Items] | |||||
| Impairment of intangible assets, indefinite-lived (excluding goodwill) | $ 300 | ||||
| X | ||||||||||
- Definition Goodwill And Other Intangible Assets No definition available.
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| X | ||||||||||
- 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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| X | ||||||||||
- Details
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