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Retirement Plans (Components of Net Periodic Benefit Cost) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 28, 2025
Sep. 29, 2024
Oct. 01, 2023
Defined Benefit Plan Disclosure [Line Items]      
Other pension and post-retirement expenses, net $ 5,814 $ 6,843 $ 6,967
Qualified Plan      
Defined Benefit Plan Disclosure [Line Items]      
Interest cost 14,825 15,791 16,068
Expected return on plan assets (15,032) (14,982) (15,105)
Actuarial (gain) loss 2,416 2,403 2,349
Net periodic benefit (credit) cost 2,209 3,212 3,312
SERP      
Defined Benefit Plan Disclosure [Line Items]      
Interest cost 2,778 3,188 3,149
Actuarial (gain) loss 990 632 718
Amortization of unrecognized prior service cost 0 14 19
Net periodic benefit (credit) cost 3,768 3,834 3,886
Postretirement Health Plans      
Defined Benefit Plan Disclosure [Line Items]      
Interest cost 615 711 700
Actuarial (gain) loss (778) (914) (932)
Net periodic benefit (credit) cost $ (163) $ (203) $ (232)