Quarterly report pursuant to Section 13 or 15(d)

Broadcast Licenses - Additional Information (Detail)

v3.21.2
Broadcast Licenses - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2021
Jun. 30, 2020
Indefinite-lived Intangible Assets [Line Items]      
Impairment charge     $ 17,254
Broadcast Licenses [Member]      
Indefinite-lived Intangible Assets [Line Items]      
License renewable term   8 years  
Impairment charge $ 0 $ 0