REVENUE RECOGNITION (Concerts Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Revenue	$ 2,889,448	$ 3,773,684	$ 3,157,009	$ 1,727,828	$ 2,601,855	$ 3,835,246	$ 2,868,315	$ 1,482,384	$ 11,547,969	$ 10,787,800	$ 9,687,222
Concerts [Member] | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Revenue									$ 9,428,094	$ 8,770,031	$ 7,892,076
Percentage Of The Concerts Business Revenue To Total Revenue									81.60%	81.30%	81.50%
Percentage Of Concerts Revenue From Events And Festivals									95.00%