REVENUE RECOGNITION (Ticketing Contract Advances) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Capitalized Contract Cost [Line Items]
Amortization of non-recoupable ticketing contract advances	$ 18,811	$ 17,237
Ticketing [Member]
Capitalized Contract Cost [Line Items]
Amortization of non-recoupable ticketing contract advances	18,800	17,200
Prepaid Expenses [Member] | Ticketing [Member]
Capitalized Contract Cost [Line Items]
Ticketing contract advances	81,500	100,900
Other Noncurrent Assets [Member] | Ticketing [Member]
Capitalized Contract Cost [Line Items]
Ticketing contract advances	$ 96,100	$ 105,700