Leases, Codification Topic 842 (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 02, 2020	Sep. 27, 2019	Sep. 28, 2018
Leases [Abstract]
Operating Lease, Expense	$ 28,100
Variable Lease, Cost	7,600
Rent expense		$ 18,700	$ 20,500
Operating Lease, Payments	25,400
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	31,000
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	25,700
Lessee, Operating Lease, Liability, Payments, Due Year Two	28,700
Lessee, Operating Lease, Liability, Payments, Due Year Three	25,100
Lessee, Operating Lease, Liability, Payments, Due Year Four	21,700
Lessee, Operating Lease, Liability, Payments, Due Year Five	20,600
Lessee, Operating Lease, Liability, Payments, Due after Year Five	81,600
Lessee, Operating Lease, Liability, Payments, Due	203,400
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(24,500)
Operating Lease, Liability	$ 178,900
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesCurrent
Operating Lease, Liability, Noncurrent	$ 150,700	0
2018		26,700
2019		25,900
2020		24,800
2021		23,300
2022		21,500
Thereafter		97,700
Operating Leases, Future Minimum Payments Due		$ 219,900
Operating Lease, Weighted Average Remaining Lease Term	8 years 2 months 12 days
Operating Lease, Weighted Average Discount Rate, Percent	3.30%