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PROPERTY, PLANT AND EQUIPMENT, INTANGIBLE ASSETS AND GOODWILL - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Indefinite-lived Intangible Assets [Line Items]    
Total amortization expense related to definite-lived intangible assets $ 64,300 $ 9,700
Goodwill impairment 1,224,374  
FCC Licenses    
Indefinite-lived Intangible Assets [Line Items]    
Impairment of FCC licenses $ 502,700 $ 91,400