Annual report pursuant to Section 13 and 15(d)

Broadcast Licenses - Carrying Value and Fair Value of Broadcast Licenses (Detail)

v3.22.0.1
Broadcast Licenses - Carrying Value and Fair Value of Broadcast Licenses (Detail) - Broadcast Licenses [Member]
$ in Thousands
 12 Months Ended
Dec. 31, 2021
USD ($)
Accounting
Less than or equal to 25% [Member]  
Indefinite-lived Intangible Assets [Line Items]  
Number Of Business Reporting Units For Market Based Services | Accounting 12
Excess Of Estimated Undiscounted Cash Flows Over Carrying Value | $ $ 193,396
>26%-50% [Member]  
Indefinite-lived Intangible Assets [Line Items]  
Number Of Business Reporting Units For Market Based Services | Accounting 1
Excess Of Estimated Undiscounted Cash Flows Over Carrying Value | $ $ 7,004
>26%-50% [Member] | Station Operating Income [Member]  
Indefinite-lived Intangible Assets [Line Items]  
Number Of Business Reporting Units For Market Based Services | Accounting 3
Excess Of Estimated Undiscounted Cash Flows Over Carrying Value | $ $ 11,967
>51% to 75% [Member]  
Indefinite-lived Intangible Assets [Line Items]  
Number Of Business Reporting Units For Market Based Services | Accounting 4
Excess Of Estimated Undiscounted Cash Flows Over Carrying Value | $ $ 52,299
>51% to 75% [Member] | Station Operating Income [Member]  
Indefinite-lived Intangible Assets [Line Items]  
Number Of Business Reporting Units For Market Based Services | Accounting 2
Excess Of Estimated Undiscounted Cash Flows Over Carrying Value | $ $ 27,465
> than 76% [Member]  
Indefinite-lived Intangible Assets [Line Items]  
Number Of Business Reporting Units For Market Based Services | Accounting 7
Excess Of Estimated Undiscounted Cash Flows Over Carrying Value | $ $ 21,785
> than 76% [Member] | Station Operating Income [Member]  
Indefinite-lived Intangible Assets [Line Items]  
Number Of Business Reporting Units For Market Based Services | Accounting 1
Excess Of Estimated Undiscounted Cash Flows Over Carrying Value | $ $ 6,092