CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 10,297	$ 99,321	$ 162,553	$ 187,826
Other comprehensive income:
Foreign currency translation adjustment	(16,731)	18,861	(10,599)	23,562
Cash flow hedges:
Change in unrealized gains	0	0	0	(3,817)
Reclassification to earnings	0	0	0	(1,333)
Tax effect on effective cash flow hedges	0	0	0	845
Change in fair value of effective cash flow hedge	0	0	0	(4,305)
Change in fair value of available for sale securities	(246)	(1,554)	(484)	4,295
Other comprehensive (loss) income	(16,977)	17,307	(11,083)	23,552
Comprehensive (loss) income	$ (6,680)	$ 116,628	$ 151,470	$ 211,378