Stockholders' Equity - Change in AOCL (Details) $ in Thousands	3 Months Ended
	Dec. 31, 2021 USD ($)
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	$ 280,741
Balance	281,021
Interest rate caps
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	(2,085)
Other comprehensive income (loss) before reclassification, net of tax	(114)
Reclassification to net earnings, net of tax	392
Balance	(1,807)
Foreign exchange contracts
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	(402)
Other comprehensive income (loss) before reclassification, net of tax	171
Reclassification to net earnings, net of tax	309
Balance	78
Foreign currency translation adjustments
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	(92,154)
Other comprehensive income (loss) before reclassification, net of tax	(4,509)
Balance	(96,663)
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	(94,641)
Other comprehensive income (loss) before reclassification, net of tax	(4,452)
Reclassification to net earnings, net of tax	701
Balance	$ (98,392)