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Amounts Reclassified Out of Accumulated Other Comprehensive Income - Reclassification out of accumulated other comprehensive (loss) income (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 27, 2025 | Sep. 28, 2024 | Sep. 30, 2023
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Balance beginning |  | $ (6,147) |  |
Recognition in earnings of net actuarial loss for pension settlement |  | 528 | $ 638 | $ 0
Other comprehensive income |  | 664 | 4,520 | 1,929
Balance ending |  | (5,483) | (6,147) |
Pension Benefits [Member] |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Balance, beginning of period |  | (9,809) | (15,190) | (17,797)
Net change in plan obligation |  | 339 | 3,254 | 680
Recognition in earnings of net actuarial loss for pension settlement | [1] | 528 | 638 | 0
Reclassifications to earnings | [1] | 245 | 1,489 | 1,927
Other comprehensive income |  | 1,112 | 5,381 | 2,607
Balance, end of period |  | (8,697) | (9,809) | (15,190)
Post-Retirement Benefits [Member] |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Balance, beginning of period |  | 3,662 | 4,523 | 5,201
Net change in plan obligation |  | 278 | 164 | 463
Prior service credits |  | (14) | 0 | 132
Reclassifications to earnings | [1] | (25) | (284) | (498)
Other comprehensive income |  | (448) | (861) | (678)
Balance, end of period |  | 3,214 | 3,662 | 4,523
Accumulated Other Comprehensive Income (Loss) [Member] |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Balance, beginning of period |  | (6,147) | (10,667) | (12,596)
Other comprehensive income before reclassifications |  | 603 | 3,418 | 1,275
Recognition in earnings of net actuarial loss for pension settlement |  | 528 | 638 | 0
Reclassifications to earnings |  | (467) | 464 | 654
Other comprehensive income |  | 664 | 4,520 | 1,929
Balance, end of period |  | (5,483) | (6,147) | (10,667)
Amortization of Net (Gain) [Member] |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Reclassifications to earnings | [1] | $ (687) | $ (741) | $ (775)
[1] | These amounts are included in the computation of net periodic benefit cost. See Note 12, “Employee Benefit Plans.”

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