Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.3
Broadcast Licenses - Schedule of Changes in Broadcasting Licenses (Detail) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2019
Dec. 31, 2018
Indefinite-lived Intangible Assets [Line Items]    
Balance before cumulative loss on impairment, beginning of period $ 484,691 $ 486,455
Accumulated loss on impairment, beginning of period (108,375) (105,541)
Balance after cumulative loss on impairment, beginning of period 376,316 380,914
Abandoned capital projects   (40)
Impairments based on the estimated fair value of broadcast licenses (1,915) (2,834)
Balance before cumulative loss on impairment, end of period 444,274 484,691
Accumulated loss on impairment, end of period (103,920) (108,375)
Balance after cumulative loss on impairment, end of period 340,354 376,316
Radio Stations [Member]    
Indefinite-lived Intangible Assets [Line Items]    
Acquisitions of FM translators and construction permits 616 6,270
Dispositions of radio stations (34,998) (8,013)
FM Translators [Member]    
Indefinite-lived Intangible Assets [Line Items]    
Acquisitions of FM translators and construction permits $ 335 $ 19