Restructuring and Other Costs, Net - Schedule of Restructuring and Other Costs, Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Restructuring Cost And Reserve [Line Items]
Restructuring and other costs, net	$ 1,172	$ 1,197	$ 11,075	$ 6,586
Personnel
Restructuring Cost And Reserve [Line Items]
Restructuring and other costs, net	1,003	1,278	7,423	1,528
Facilities
Restructuring Cost And Reserve [Line Items]
Restructuring and other costs, net	(33)	154	310	521
Restructuring Subtotal
Restructuring Cost And Reserve [Line Items]
Restructuring and other costs, net	970	1,432	7,733	2,049
Other
Restructuring Cost And Reserve [Line Items]
Restructuring and other costs, net	$ (202)	$ (235)	$ (3,342)	$ 4,537