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 |