Leases (Supplemental Balance Sheet Lease Information) (Details) - USD ($) $ in Thousands	Mar. 28, 2026	Sep. 27, 2025
Leases [Abstract]
Operating lease right-of-use assets	$ 54,149	$ 52,799
Operating lease - Accrued liabilities and other	13,269	11,697
Operating lease - Other long-term liabilities	51,569	52,549
Total operating lease liabilities	$ 64,838	64,246
Operating leases - Accrued liabilities and other	Accrued Liabilities, Current
Operating leases - Other long-term liabilities	Other Liabilities, Noncurrent
Total operating lease liabilities	Liabilities
Finance leases - Property, plant and equipment, at cost	$ 180,254	157,533
Finance leases - Accumulated depreciation	(31,121)	(27,186)
Finance leases - Property, plant, and equipment, net	$ 149,133	130,347
Finance Lease - Property, plant and equipment, net	Property, plant and equipment, net
Finance leases - Accrued liabilities and other	$ 17,650	14,920
Finance leases - Other long-term liabilities	135,464	119,155
Total finance lease liabilities	$ 153,114	$ 134,075
Finance leases - Accrued liabilities and other	Accrued Liabilities, Current
Finance leases - Other long-term liabilities	Other Liabilities, Noncurrent
Total finance lease liabilities	Liabilities
Weighted average remaining lease term - Operating leases	5 years 10 months 24 days	6 years 2 months 12 days
Weighted average remaining lease term - Financing leases	16 years 4 months 24 days	17 years 7 months 6 days
Weighted average discount rate - Operating leases	5.40%	5.30%
Weighted average discount rate - Finance leases	6.30%	6.40%