REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Net revenues	$ 275,295	$ 240,764
Spot revenues
Disaggregation of Revenue [Line Items]
Net revenues	175,135	154,294
Digital revenues
Disaggregation of Revenue [Line Items]
Net revenues	58,039	49,840
Network revenues
Disaggregation of Revenue [Line Items]
Net revenues	21,141	17,570
Sponsorships and event revenues
Disaggregation of Revenue [Line Items]
Net revenues	10,327	9,158
Other revenues
Disaggregation of Revenue [Line Items]
Net revenues	$ 10,653	$ 9,902