Leases - Schedule of Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands		12 Months Ended
		Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Leases [Abstract]
Operating cash flows from operating leases		$ 36,303	$ 35,498	$ 36,038
Right-of-use assets obtained in exchange for new lease obligations, operating leases	[1]	$ 16,664	$ 11,079	$ 28,257

[1] In the year ended September 30, 2023, operating lease additions included $4.0 million related to the ServiceMax acquisition.