CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - 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	$ 139,456	$ 266,914	$ 326,297	$ 338,987
Other comprehensive income (loss):
Currency translation gain (loss), net of taxes	(4,731)	3,205	(3,927)	4,444
Reclassification of cumulative translation adjustment to other income (expense), net	5	(1,738)	1,051	(1,738)
Defined benefit plans:
Net gain (loss) and prior service costs, net of taxes	95	(434)	(405)	544
Amortization included in other income (expense), net	212	176	423	345
Hedging gain (loss):
Deferred hedging gain (loss), net of taxes	2,132	(1,059)	2,662	(3,426)
Reclassification of net hedging impact into cost of goods sold	(1,314)	1,969	(1,908)	1,639
Total other comprehensive income (loss)	(3,601)	2,119	(2,104)	1,808
Total comprehensive income	$ 135,855	$ 269,033	$ 324,193	$ 340,795