INTANGIBLE ASSETS AND GOODWILL - Changes in Carrying Value of Broadcasting Licenses (Details) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended |
|---|---|---|
Mar. 31, 2024 |
Dec. 31, 2023 |
|
| Indefinite-lived Intangible Assets [Roll Forward] | ||
| Beginning balance | $ 794,771 | $ 2,089,226 |
| Disposition of radio stations | 0 | (4,956) |
| Loss on impairment | 0 | (1,289,499) |
| Ending balance | $ 794,771 | $ 794,771 |
| Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration] | Impairment loss | Impairment loss |