Quarterly report pursuant to Section 13 or 15(d)

Broadcast Licenses - Additional Information (Detail)

v3.21.1
Broadcast Licenses - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 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