PROPERTY, PLANT AND EQUIPMENT, INTANGIBLE ASSETS AND GOODWILL - Schedule Of Gross Carrying Amount and Accumulated Amortization for Other Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 2,347,908	$ 1,868,547
Accumulated Amortization	(109,485)	(1,668,125)
Customer / advertiser relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,649,770	1,326,636
Accumulated Amortization	(74,420)	(1,278,885)
Talent and other contracts
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	375,399	164,933
Accumulated Amortization	(21,087)	(148,578)
Trademarks and tradenames
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	321,977	0
Accumulated Amortization	(13,538)	0
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	762	376,978
Accumulated Amortization	$ (440)	$ (240,662)