REVENUE FROM CONTRACTS WITH CUSTOMERS (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue from Contract with Customer [Abstract]
Contract with liability	$ 806,123	$ 864,360
Contract with liability recognized	850,266
Contract asset	81,625	$ 57,643
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining obligation	889,287
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining obligation	$ 800,549
Revenue obligation, expected timing of satisfaction	12 months