REVENUE FROM CONTRACTS WITH CUSTOMERS (Geographical) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Total net revenue	$ 760,541	$ 930,129	$ 857,841	$ 540,459	$ 539,007	$ 1,248,738	$ 492,667	$ 387,982	$ 3,088,970	$ 2,668,394	$ 1,792,892
United States
Disaggregation of Revenue [Line Items]
Total net revenue									1,775,682	1,426,906	1,052,313
International
Disaggregation of Revenue [Line Items]
Total net revenue									$ 1,313,288	$ 1,241,488	$ 740,579