Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 46,089	$ 23,515
Other comprehensive income (loss), net of tax:
Hedge gain (loss) arising during the period, net of tax of $0.8 million and $0 million in the first quarter of 2022 and 2021, respectively	2,495	(6,779)
Foreign currency translation adjustment, net of tax of $0 for each period	(5,668)	19,975
Unrealized gain (loss) on marketable securities, net of tax of $0 for each period	0	(307)
Amortization of net actuarial pension loss included in net income, net of tax of $0.1 million and $0.3 million in the first quarter of 2022 and 2021, respectively	265	732
Change in unamortized pension gain (loss) during the period related to changes in foreign currency	385	(1,112)
Other comprehensive income (loss)	(2,523)	12,509
Comprehensive income	$ 43,566	$ 36,024