ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Changes in accumulated other comprehensive loss
Beginning balance	$ 2,539,244	$ 2,040,580
Ending balance	3,155,291	2,402,035
Foreign currency translation adjustments
Changes in accumulated other comprehensive loss
Beginning balance	(60,535)	(33,090)
Other comprehensive income (loss) before reclassifications	53,697	(3,192)
Amounts reclassified from accumulated other comprehensive loss	0	0
Ending balance	(6,838)	(36,282)
Unrealized gain (loss) on forward contracts
Changes in accumulated other comprehensive loss
Beginning balance	600	600
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive loss	(600)	0
Ending balance	0	600
Unrealized gain (loss) on cross-currency swap
Changes in accumulated other comprehensive loss
Beginning balance	4,305	(5,285)
Other comprehensive income (loss) before reclassifications	(2,972)	2,598
Amounts reclassified from accumulated other comprehensive loss	(1,333)	(1,157)
Ending balance	0	(3,844)
Unrealized gain (loss) on available-for- sales securities
Changes in accumulated other comprehensive loss
Beginning balance	(2,746)	586
Other comprehensive income (loss) before reclassifications	4,000	453
Amounts reclassified from accumulated other comprehensive loss	0	0
Ending balance	1,254	1,039
Total
Changes in accumulated other comprehensive loss
Beginning balance	(58,376)	(37,189)
Other comprehensive income (loss) before reclassifications	54,725	(141)
Amounts reclassified from accumulated other comprehensive loss	(1,933)	(1,157)
Ending balance	$ (5,584)	$ (38,487)