Income Taxes - Schedule of Provision For (Benefit From) Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Federal	$ 767	$ 4,774	$ 2,187
State	6,675	1,609	1,266
Foreign	33,612	66,554	25,199
Current provision for income taxes	41,054	72,937	28,652
Federal	25,730	(152,311)	(26,811)
State	(3,177)	(27,228)	(4,063)
Foreign	20,410	21,434	6,233
Deferred provision for (benefit from) income taxes	42,963	(158,105)	(24,641)
Provision (benefit) for income taxes	$ 84,017	$ (85,168)	$ 4,011