Quarterly report pursuant to Section 13 or 15(d)

Broadcast Licenses - Additional Information (Detail)

v3.20.2
Broadcast Licenses - 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
Indefinite-lived Intangible Assets [Line Items]          
Impairment charge $ 0   $ 1,915 $ 17,254 $ 1,915
Broadcast Licenses [Member]          
Indefinite-lived Intangible Assets [Line Items]          
License renewable term       8 years  
Impairment charge $ 0 $ 17,000