Quarterly report pursuant to Section 13 or 15(d)

Broadcast Licenses - Schedule of Changes in Broadcasting Licenses (Detail)

v3.21.2
Broadcast Licenses - Schedule of Changes in Broadcasting Licenses (Detail) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Indefinite-lived Intangible Assets [Line Items]    
Balance, beginning of period before cumulative loss on impairment $ 434,209 $ 435,300
Accumulated loss on impairment, Beginning Balance (114,436) (97,442)
Balance, beginning of period after cumulative loss on impairment 319,773 337,858
Disposition of radio stations   (1,091)
Impairments based on the estimated fair value of broadcast licenses   (16,994)
Balance, end of period before cumulative loss on impairment 434,444 434,209
Accumulated loss on impairment, Ending Balance (114,436) (114,436)
Balance, end of period after cumulative loss on impairment 320,008 $ 319,773
Radio Stations [Member]    
Indefinite-lived Intangible Assets [Line Items]    
Acquisitions of radio stations $ 235