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GOODWILL AND RADIO BROADCASTING LICENSES (Details Textual) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2017
Columbus and Houston Radio Broadcasting Licenses [Member]    
Schedule Of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]    
Pre Tax Impairment Charges $ 16.4 $ 29.1