CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 418,022	$ 588,886	$ 404,459
Other comprehensive income (loss)
Foreign currency translation adjustment	(43,589)	51,253	(27,445)
Cash flow hedges:
Change in unrealized gains	0	(3,817)	10,504
Reclassification to earnings	0	(1,933)	(1,689)
Tax effect on effective cash flow hedges	0	845	775
Change in fair value of cash flow hedges	0	(4,905)	9,590
Change in fair value of available-for-sale securities	(5,092)	3,364	(3,332)
Other comprehensive income (loss)	(48,681)	49,712	(21,187)
Comprehensive income	$ 369,341	$ 638,598	$ 383,272