Leases - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Sep. 29, 2018	Sep. 29, 2019
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets	$ 69,879	$ 0		$ 75,790
Present value of lease liabilities	44,503
Other non-current assets	35,727	64,714		34,521
Retained earnings	$ 1,295,079	1,178,677		1,177,600
Amortization of assets held under capital leases		3,800	$ 3,400
Capital lease additions		6,700	11,800
Operating Leases, rent expense		$ 12,900	$ 12,000
Minimum
Lessee, Lease, Description [Line Items]
Lessee Lease Term of Contract	1 year
Maximum
Lessee, Lease, Description [Line Items]
Lessee Lease Term of Contract	40 years
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets				75,790
Present value of lease liabilities				45,500
Other non-current assets				(30,193)
Retained earnings				(1,077)
Before [Domain] | Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets				$ 45,500