GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS (Details 3) - USD ($) $ in Millions	Dec. 31, 2017	Oct. 01, 2017	Dec. 31, 2016	Oct. 01, 2016
Schedule of GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS [Line Items]
Pre-tax impairment charge	$ 29.1		$ 1.3
Reach Media Segment Goodwill [Member]
Schedule of GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS [Line Items]
Pre-tax impairment charge		$ 0.0		$ 0.0
Discount Rate		10.50%		10.50%
Year 1 Revenue Growth Rate		(11.30%)		(0.30%)
Long-term Revenue Growth Rate (Years)		1.00%		1.00%
Reach Media Segment Goodwill [Member] | Minimum [Member]
Schedule of GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS [Line Items]
Operating Profit Margin Range		13.50%		15.10%
Reach Media Segment Goodwill [Member] | Maximum [Member]
Schedule of GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS [Line Items]
Operating Profit Margin Range		15.90%		17.50%