Leases - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 03, 2020	Sep. 28, 2019
Lessee, Lease, Description [Line Items]
Term of option to extend	5 years
Termination option period	1 year
Weighted-average discount rate - operating leases	4.10%
Weighted-average remaining lease term (years) - operating leases	4 years 7 months 6 days
Rental expense	$ 13.4	$ 14.2
Common area maintenance expense	$ 5.0	$ 5.2
Minimum
Lessee, Lease, Description [Line Items]
Term of contract	1 year
Maximum
Lessee, Lease, Description [Line Items]
Term of contract	10 years