Broadcast Licenses - Additional Information (Detail) - USD ($) $ in Thousands  | 
3 Months Ended | 9 Months Ended | ||||
|---|---|---|---|---|---|---|
Sep. 30, 2022  | 
Jun. 30, 2022  | 
Sep. 30, 2022  | 
Sep. 30, 2021  | 
Sep. 30, 2022  | 
Sep. 30, 2021  | 
|
| Indefinite-lived Intangible Assets [Line Items] | ||||||
| Impairment charge | $ 7,725 | $ 0 | $ 11,660 | $ 0 | ||
| Broadcast Licenses [Member] | ||||||
| Indefinite-lived Intangible Assets [Line Items] | ||||||
| License renewable term | 8 years | |||||
| Impairment charge | $ 7,700 | $ 3,900 | $ 0 | |||
| X | ||||||||||
- Definition License renewal term. 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 | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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| X | ||||||||||
- Details 
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