BASIS OF PRESENTATION, CONSOLIDATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Interest income	$ 2,269	$ 144	$ 3,677	$ 512
Interest expense	(29,382)	(19,237)	(84,367)	(54,189)
Interest expense, net	$ (27,113)	$ (19,093)	$ (80,690)	$ (53,677)