REVENUE FROM CONTRACTS WITH CUSTOMERS (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Mar. 31, 2019
Revenue from Contract with Customer [Abstract]
Contract with liability	$ 874,776		$ 874,776		$ 864,360
Contract with liability recognized	193,468	$ 80,471	758,301	$ 504,600
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining obligation	967,609		967,609
Contract asset	74,412		74,412		$ 57,643
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining obligation	$ 872,647		$ 872,647
Remaining obligation period	1 year		1 year