Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.2
Broadcast Licenses - Schedule of Changes in Broadcasting Licenses (Detail) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Indefinite-lived Intangible Assets [Line Items]    
Balance before cumulative loss on impairment, beginning of period $ 441,143 $ 484,691
Accumulated loss on impairment, beginning of period (103,285) (108,375)
Balance after cumulative loss on impairment, beginning of period 337,858 376,316
Impairments based on the estimated fair value of broadcast licenses (16,994) (2,908)
Balance, end of period before cumulative loss on impairment 440,052 441,143
Accumulated loss on impairment, end of period (120,279) (103,285)
Balance, end of period after cumulative loss on impairment 319,773 337,858
Radio Stations [Member]    
Indefinite-lived Intangible Assets [Line Items]    
Acquisitions of FM translators and construction permits   617
Dispositions of radio stations $ (1,091) (36,502)
FM Translators [Member]    
Indefinite-lived Intangible Assets [Line Items]    
Acquisitions of FM translators and construction permits   35
Capital Projects [Member]    
Indefinite-lived Intangible Assets [Line Items]    
Acquisitions of FM translators and construction permits   $ 300