REVENUE FROM CONTRACTS WITH CUSTOMERS - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Mar. 31, 2021
Revenue from Contract with Customer [Abstract]
Contract with liability	$ 1,003,143		$ 1,003,143		$ 965,331
Contract with liability recognized	278,306	$ 241,732	741,547	$ 612,946
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining obligation	1,152,076		1,152,076
Contract asset	107,865		107,865		$ 105,554
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining obligation	$ 1,035,546		$ 1,035,546
Remaining obligation period	12 months		12 months