REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Net revenues	$ 386,141	$ 378,508	$ 1,075,811	$ 1,051,192
Broadcast revenues [Member]
Disaggregation of Revenue [Line Items]
Net revenues	356,683	348,066	991,768	963,118
Event and other revenues [Member]
Disaggregation of Revenue [Line Items]
Net revenues	25,353	26,391	71,754	77,252
Trade and barter revenues [Member]
Disaggregation of Revenue [Line Items]
Net revenues	$ 4,105	$ 4,051	$ 12,289	$ 10,822