GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS - Digital Segment (Details) - USD ($)			12 Months Ended
	Oct. 01, 2021	Oct. 01, 2020	Dec. 31, 2021	Dec. 31, 2020
Schedule of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]
Pre Tax Impairment Charges			$ 0	$ 84,400,000
Digital Segment [Member]
Schedule of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]
Pre Tax Impairment Charges	$ 0	$ 0
Discount Rate	14.00%	14.00%
Year 1 Revenue Growth Rate	(20.40%)	(5.40%)
Digital Segment [Member] | Maximum
Schedule of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]
Long-term Revenue Growth Rate (Years 6 - 10)		6.00%
Operating Profit Margin Range	14.30%	13.10%
Long-term market revenue growth rate period	10 years	10 years
Digital Segment [Member] | Minimum
Schedule of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]
Long-term Revenue Growth Rate (Years 6 - 10)		3.40%
Operating Profit Margin Range	(5.20%)	(12.50%)
Long-term market revenue growth rate period	6 years	6 years