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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)

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