GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS: (Details 2) (Radio Marketing Units [Member], USD $)	Oct. 01, 2014		Oct. 01, 2013		Oct. 01, 2012
Schedule Of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]
Impairment charge (in millions)	$ 0	[1]	$ 0	[1]	$ 14,500,000	[1]
Discount Rate	9.50%	[1]	10.00%	[1]	10.00%	[1]
Minimum [Member]
Schedule Of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]
Year 1 Market Revenue Growth Rate Range	0.30%	[1]	0.00%	[1]	1.00%	[1]
Long-term Market Revenue Growth Rate Range (Years 6 - 10)	1.00%	[1]	1.00%	[1]	1.50%	[1]
Mature Market Share Range	7.20%	[1]	7.10%	[1]	6.70%	[1]
Operating Profit Margin Range	26.40%	[1]	28.40%	[1]	29.30%	[1]
Maximum [Member]
Schedule Of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]
Year 1 Market Revenue Growth Rate Range	1.00%	[1]	2.00%	[1]	2.00%	[1]
Long-term Market Revenue Growth Rate Range (Years 6 - 10)	2.00%	[1]	2.00%	[1]	2.00%	[1]
Mature Market Share Range	19.50%	[1]	19.80%	[1]	20.80%	[1]
Operating Profit Margin Range	52.20%	[1]	56.40%	[1]	58.50%	[1]

[1] Reflects the key assumptions for testing only those radio markets with remaining goodwill.