Leases - Additional Information (Details) $ in Millions			12 Months Ended
	Jul. 13, 2023 ft²	May 11, 2023 USD ($)	Sep. 30, 2023 USD ($)	Oct. 01, 2022 USD ($)
Lessee, Lease, Description [Line Items]
Term of option to extend			5 years
Termination option period			1 year
Weighted-average discount rate - operating leases			5.14%
Weighted-average remaining lease term (years) - operating leases			9 years 1 month 6 days
Operating lease extension period			The lease expires in May 2031, with no option to extend
Office space under lease agreement | ft²	50,000
Lease expiration date	May 31, 2031
Rental expense			$ 12.7	$ 11.3
Common area maintenance expense			$ 5.5	$ 4.3
Lafayette City Center
Lessee, Lease, Description [Line Items]
Operating lease extension period			an extension of the lease term through July 2035
Operating lease increase in right of use asset		$ 31.6
Operating lease increase in lease liability		$ 30.4