INTANGIBLE ASSETS AND GOODWILL - Changes in Carrying Value of Broadcasting Licenses (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Indefinite-lived Intangible Assets [Roll Forward]
Broadcasting licenses balance as of January 1,	$ 2,089,226	$ 2,251,546
Disposition of radio stations	(4,956)	(4,377)
Acquisitions	0	2,002
Loss on impairment	(390,600)	(159,089)
Assets held for sale	0	(856)
Ending period balance	$ 1,693,670	$ 2,089,226
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration]	Impairment loss	Impairment loss