Income Taxes - Components of Benefit from Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Domestic	$ 21,229	$ (2,892)
Foreign	2,321	5,195
Provision for income taxes	$ 23,550	$ 2,303
Effective tax rate	(69.20%)	24.90%