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PROPERTY, PLANT AND EQUIPMENT, INTANGIBLE ASSETS AND GOODWILL - Schedule of Gross Carrying Amount and Accumulated Amortization of Other Intangible Assets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 2,353,821 $ 2,348,006
Accumulated Amortization (429,329) (171,466)
Customer / advertiser relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 1,620,509 1,629,236
Accumulated Amortization (286,066) (114,280)
Talent contracts    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 375,900 375,399
Accumulated Amortization (84,065) (33,739)
Trademarks and tradenames    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 326,061 321,977
Accumulated Amortization (54,358) (21,661)
Other    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 31,351 21,394
Accumulated Amortization $ (4,840) $ (1,786)