GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS - Carrying Balances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Schedule of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]
Radio Broadcasting Licenses	$ 505,148	$ 484,066
Radio Broadcasting Licenses Increase (Decrease)	21,082
Unit Of Accounting 2 [Member]
Schedule of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]
Radio Broadcasting Licenses	3,086	3,086
Radio Broadcasting Licenses Increase (Decrease)	0
Unit of Accounting 5 [Member]
Schedule of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]
Radio Broadcasting Licenses	13,525	13,525
Radio Broadcasting Licenses Increase (Decrease)	0
Unit Of Accounting 7 [Member]
Schedule of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]
Radio Broadcasting Licenses	15,223	15,223
Radio Broadcasting Licenses Increase (Decrease)	0
Unit of Accounting 11 [Member]
Schedule of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]
Radio Broadcasting Licenses	15,560	15,560
Radio Broadcasting Licenses Increase (Decrease)	0
Unit of Accounting 4 [Member]
Schedule of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]
Radio Broadcasting Licenses	37,224	16,142
Radio Broadcasting Licenses Increase (Decrease)	21,082
Unit of Accounting 14 [Member]
Schedule of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]
Radio Broadcasting Licenses	19,070	19,070
Radio Broadcasting Licenses Increase (Decrease)	0
Unit of Accounting 6 [Member]
Schedule of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]
Radio Broadcasting Licenses	22,642	22,642
Radio Broadcasting Licenses Increase (Decrease)	0
Unit of Accounting 13 [Member]
Schedule of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]
Radio Broadcasting Licenses	39,646	39,646
Radio Broadcasting Licenses Increase (Decrease)	0
Unit of Accounting 12 [Member]
Schedule of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]
Radio Broadcasting Licenses	32,968	32,968
Radio Broadcasting Licenses Increase (Decrease)	0
Unit of Accounting 8 [Member]
Schedule of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]
Radio Broadcasting Licenses	52,515	52,515
Radio Broadcasting Licenses Increase (Decrease)	0
Unit of Accounting 16 [Member]
Schedule of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]
Radio Broadcasting Licenses	54,670	54,670
Radio Broadcasting Licenses Increase (Decrease)	0
Unit of Accounting 1 [Member]
Schedule of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]
Radio Broadcasting Licenses	84,369	84,369
Radio Broadcasting Licenses Increase (Decrease)	0
Unit of Accounting 10 [Member]
Schedule of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]
Radio Broadcasting Licenses	114,650	$ 114,650
Radio Broadcasting Licenses Increase (Decrease)	$ 0