GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS: (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Schedule of GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS [Line Items]
Radio Broadcasting Licenses	$ 659,824
Radio Broadcasting Licenses Additions	6,973
Radio Broadcasting Licenses	666,797
Unit Of Accounting 2 [Member]
Schedule of GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS [Line Items]
Radio Broadcasting Licenses	3,086
Radio Broadcasting Licenses Additions	0
Radio Broadcasting Licenses	3,086
Unit Of Accounting 4 [Member]
Schedule of GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS [Line Items]
Radio Broadcasting Licenses	9,169
Radio Broadcasting Licenses Additions	6,973
Radio Broadcasting Licenses	16,142
Unit Of Accounting 5 [Member]
Schedule of GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS [Line Items]
Radio Broadcasting Licenses	16,687
Radio Broadcasting Licenses Additions	0
Radio Broadcasting Licenses	16,687
Unit Of Accounting 7 [Member]
Schedule of GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS [Line Items]
Radio Broadcasting Licenses	16,165
Radio Broadcasting Licenses Additions	0
Radio Broadcasting Licenses	16,165
Unit Of Accounting 14 [Member]
Schedule of GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS [Line Items]
Radio Broadcasting Licenses	20,434
Radio Broadcasting Licenses Additions	0
Radio Broadcasting Licenses	20,434
Unit Of Accounting 15 [Member]
Schedule of GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS [Line Items]
Radio Broadcasting Licenses	20,886
Radio Broadcasting Licenses Additions	0
Radio Broadcasting Licenses	20,886
Unit Of Accounting 11 [Member]
Schedule of GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS [Line Items]
Radio Broadcasting Licenses	21,135
Radio Broadcasting Licenses Additions	0
Radio Broadcasting Licenses	21,135
Unit Of Accounting 9 [Member]
Schedule of GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS [Line Items]
Radio Broadcasting Licenses	34,270
Radio Broadcasting Licenses Additions	0
Radio Broadcasting Licenses	34,270
Unit Of Accounting 6 [Member]
Schedule of GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS [Line Items]
Radio Broadcasting Licenses	22,642
Radio Broadcasting Licenses Additions	0
Radio Broadcasting Licenses	22,642
Unit Of Accounting 16 [Member]
Schedule of GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS [Line Items]
Radio Broadcasting Licenses	52,965
Radio Broadcasting Licenses Additions	0
Radio Broadcasting Licenses	52,965
Unit Of Accounting 13 [Member]
Schedule of GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS [Line Items]
Radio Broadcasting Licenses	52,556
Radio Broadcasting Licenses Additions	0
Radio Broadcasting Licenses	52,556
Unit Of Accounting 8 [Member]
Schedule of GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS [Line Items]
Radio Broadcasting Licenses	66,715
Radio Broadcasting Licenses Additions	0
Radio Broadcasting Licenses	66,715
Unit Of Accounting 12 [Member]
Schedule of GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS [Line Items]
Radio Broadcasting Licenses	50,179
Radio Broadcasting Licenses Additions	0
Radio Broadcasting Licenses	50,179
Unit Of Accounting 1 [Member]
Schedule of GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS [Line Items]
Radio Broadcasting Licenses	93,394
Radio Broadcasting Licenses Additions	0
Radio Broadcasting Licenses	93,394
Unit Of Accounting 10 [Member]
Schedule of GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS [Line Items]
Radio Broadcasting Licenses	179,541
Radio Broadcasting Licenses Additions	0
Radio Broadcasting Licenses	$ 179,541