GOODWILL AND INTANGIBLE ASSETS Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Gross	$ 380,125	$ 369,039
Accumulated Amortization	(229,832)	(220,804)
Net	150,293	148,235
Trademarks
Indefinite-lived intangible assets (excluding goodwill)	90,422	87,900
Gross	433	421
Accumulated Amortization	(433)	(421)
Net	0	0
Broadcast licenses
Gross	227,013	220,194
Accumulated Amortization	(168,926)	(161,820)
Net	58,087	58,374
Customer relationships
Gross	60,455	58,771
Accumulated Amortization	(58,849)	(56,996)
Net	$ 1,606	1,775
Customer relationships | Minimum [Member]
Useful life of finite-lived intangible assets (in years)	5 years
Customer relationships | Maximum [Member]
Useful life of finite-lived intangible assets (in years)	15 years
Other
Gross	$ 1,802	1,753
Accumulated Amortization	(1,624)	(1,567)
Net	$ 178	$ 186