Restructuring and Other Costs, Net - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Restructuring Cost And Reserve [Line Items]
Restructuring and other costs, net	$ 8,965	$ 5,092	$ 16,458
Severance Charge
Restructuring Cost And Reserve [Line Items]
Restructuring and other costs, net	1,676	1,689	3,694
Facilities Closure
Restructuring Cost And Reserve [Line Items]
Restructuring and other costs, net	673	1,394	1,037
Other One-Time Charges
Restructuring Cost And Reserve [Line Items]
Restructuring and other costs, net	2,600	$ 2,000
Professional Services Fees
Restructuring Cost And Reserve [Line Items]
Restructuring and other costs, net			$ 11,700
Stock Based Compensation due to the Resignation of Former CEO
Restructuring Cost And Reserve [Line Items]
Restructuring and other costs, net	4,000
Stock Based Compensation, Net of Forfeitures, due to the Resignation of Former CEO
Restructuring Cost And Reserve [Line Items]
Restructuring and other costs, net	$ 5,000