DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Mar. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Forward contracts to sell foreign currencies	$ 193,693		$ 193,693		$ 122,024
Forward contracts to purchase foreign currencies	71,783		71,783		$ 52,596
Derivative instrument not designated as hedging instruments, gain (loss), net	(1,029)	$ 2,210	$ (3,685)	$ (1,087)
Amount reclassified from accumulated other comprehensive income (loss) to earnings	3,109
Proceeds from settled derivative asset	$ 7,420