Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net earnings	$ 183,553	$ 239,858	$ 113,245
Other comprehensive (loss) income:
Foreign currency translation adjustments	(60,974)	9,957	11,821
Interest rate caps, net of tax	4,045	918	198
Foreign exchange contracts, net of tax	(277)	(813)	565
Other comprehensive (loss) income, net of tax	(57,206)	10,062	12,584
Total comprehensive income	$ 126,347	$ 249,920	$ 125,829