Leases - Schedule of Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands		12 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Leases [Abstract]
Operating cash flows from operating leases		$ 36,038	$ 38,709	$ 50,299
Financing cash flows from financing leases		536	297	354
Right-of-use assets obtained in exchange for new lease obligations, operating leases	[1]	28,257	15,431	9,576
Right-of-use assets obtained in exchange for new lease obligations, financing leases	[2]	$ 40	$ 0	$ 1,146

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

[2] In the year ended September 30, 2023, all financing lease additions related to the ServiceMax acquisition.