Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement Of Income And Comprehensive Income [Abstract]
Net earnings	$ 46,567	$ 76,206	$ 162,214	$ 171,709
Other comprehensive (loss) income:
Foreign currency translation adjustments	(27,384)	6,617	(34,645)	23,734
Interest rate caps, net of tax	2,050	471	2,328	646
Foreign exchange contracts, net of tax	432	(191)	588	(1,211)
Other comprehensive (loss) income, net of tax	(24,902)	6,897	(31,729)	23,169
Total comprehensive income	$ 21,665	$ 83,103	$ 130,485	$ 194,878