Note 5 Leases (Detail) - USD ($) $ in Thousands	Apr. 02, 2022	Oct. 02, 2021
Asset and Liabilities, Lessee [Line Items]
Operating Lease, Liability, Current	$ 16,869	$ 17,219
Operating Lease, Liability, Noncurrent	38,989	$ 38,587
Operating Lease, Liability	$ 55,858
Operating Lease, Weighted Average Remaining Lease Term	14 years 3 months	14 years 5 months 15 days
Operating Lease, Weighted Average Discount Rate, Percent	2.61%	2.72%
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued liabilities	Accrued liabilities
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other	Other
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other	Other
Other Assets [Member]
Asset and Liabilities, Lessee [Line Items]
Operating Lease, Right-of-Use Asset	$ 67,729	$ 68,012
Liabilities, Total [Member]
Asset and Liabilities, Lessee [Line Items]
Operating Lease, Liability	$ 55,858	$ 55,806