GOODWILL AND RADIO BROADCASTING LICENSES: (Details) (Income Approach Valuation Technique [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2014		Oct. 01, 2013	Mar. 31, 2013
Schedule of GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS [Line Items]
Pre-tax impairment charge (in millions)	$ 0	[1]	$ 0	$ 1.4	[1]
Discount Rate	10.00%	[1]	10.00%	10.00%	[1]
Year 1 Market Revenue Growth Rate Range	1.00%	[1]		1.00%	[1]
Long-term Market Revenue Growth Rate Range (Years 6 - 10)	1.50%	[1]		1.50%	[1]
Mature Market Share Range	8.60%	[1]		8.60%	[1]
Operating Profit Margin Range	33.60%	[1]		31.40%	[1]
Minimum [Member]
Schedule of GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS [Line Items]
Year 1 Market Revenue Growth Rate Range			0.00%
Long-term Market Revenue Growth Rate Range (Years 6 - 10)			1.00%
Mature Market Share Range			6.40%
Operating Profit Margin Range			30.80%
Maximum [Member]
Schedule of GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS [Line Items]
Year 1 Market Revenue Growth Rate Range			2.00%
Long-term Market Revenue Growth Rate Range (Years 6 - 10)			2.00%
Mature Market Share Range			26.90%
Operating Profit Margin Range			47.80%

[1] Reflects changes only to the key assumptions used in the interim testing for certain units of accounting.