GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS (Details 1) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Schedule of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]
Radio Broadcasting Licenses		$ 600,134	$ 614,535
Radio Broadcasting Licenses Increase (Decrease)	[1]	(14,401)
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 7 [Member]
Schedule of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]
Radio Broadcasting Licenses		14,748	14,748
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		16,100	16,100
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		16,142	16,142
Radio Broadcasting Licenses Increase (Decrease)		0
Unit of Accounting 9 [Member]
Schedule of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]
Radio Broadcasting Licenses		16,437	32,875
Radio Broadcasting Licenses Increase (Decrease)		(16,438)
Unit of Accounting 15 [Member]
Schedule of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]
Radio Broadcasting Licenses		20,736	20,736
Radio Broadcasting Licenses Increase (Decrease)		0
Unit of Accounting 14 [Member]
Schedule of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]
Radio Broadcasting Licenses		20,770	20,770
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		21,135	21,135
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		47,846	47,846
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		49,663	49,663
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		56,295	54,258
Radio Broadcasting Licenses Increase (Decrease)		2,037
Unit of Accounting 8 [Member]
Schedule of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]
Radio Broadcasting Licenses		62,015	62,015
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		93,394	93,394
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		139,125	$ 139,125
Radio Broadcasting Licenses Increase (Decrease)		$ 0

[1] The amount listed is net of additions, dispositions and impairment charges.