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Amounts Reclassified Out of Accumulated Other Comprehensive Income - Reclassification Out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 29, 2025 | Mar. 30, 2024 | Mar. 29, 2025 | Mar. 30, 2024
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |  |
Balance, beginning of period |  |  |  | $ (6,147) |
Other comprehensive (loss) income |  | $ (117) | $ 169 | (233) | $ 338
Balance, end of period |  | (6,380) |  | (6,380) |
Pension Benefits [Member] |  |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |  |
Balance, beginning of period |  | (9,747) | (14,765) | (9,809) | (15,190)
Reclassifications to earnings | [1] | 61 | 426 | 123 | 851
Other comprehensive (loss) income |  | 61 | 426 | 123 | 851
Balance, end of period |  | (9,686) | (14,339) | (9,686) | (14,339)
Postretirement Benefits [Member] |  |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |  |
Balance, beginning of period |  | 3,484 | 4,267 | 3,662 | 4,523
Amortization of net gain and prior service credits | [1] | (178) | (257) | (356) | (513)
Other comprehensive (loss) income |  | (178) | (257) | (356) | (513)
Balance, end of period |  | 3,306 | 4,010 | 3,306 | 4,010
Accumulated Other Comprehensive Income (Loss) |  |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |  |
Balance, beginning of period |  | (6,263) | (10,498) | (6,147) | (10,667)
Reclassifications to earnings |  | (117) | 169 | (233) | 338
Other comprehensive (loss) income |  | (117) | 169 | (233) | 338
Balance, end of period |  | $ (6,380) | $ (10,329) | $ (6,380) | $ (10,329)
[1] | These amounts are included in the computation of net periodic benefit cost. See Note 15, “Pension Plans and Other Postretirement Benefits.”

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