Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Statement Of Income And Comprehensive Income [Abstract]
Net earnings	$ 46,808	$ 38,312	$ 115,646	$ 95,503
Other comprehensive (loss) income:
Foreign currency translation adjustments	(2,752)	(7,890)	(7,261)	17,117
Interest rate caps, net of tax			278	175
Foreign exchange contracts, net of tax	(324)	574	156	(1,020)
Other comprehensive (loss) income, net of tax	(3,076)	(7,316)	(6,827)	16,272
Total comprehensive income	$ 43,732	$ 30,996	$ 108,819	$ 111,775