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REVENUE - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Trade and barter revenues $ 919,185 $ 953,640 $ 1,730,114 $ 1,796,808
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-07-01        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Revenue, remaining performance obligation $ 317,800   $ 317,800  
Revenue, remaining performance obligation, period 5 years   5 years  
Advertising Trade and Barter Transactions        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Trade and barter revenues $ 3,700 $ 5,200 $ 11,700 $ 12,300