REVENUE FROM CONTRACTS WITH CUSTOMERS (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Mar. 31, 2020
Revenue from Contract with Customer [Abstract]
Contract with liability	$ 960,951		$ 806,123
Contract with liability recognized	371,213	$ 330,421
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining obligation	1,070,511
Contract asset	92,733		$ 81,625
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining obligation	$ 980,660
Remaining obligation period	12 months