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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
--- | ---
Dec. 30, 2023 | Dec. 24, 2022
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Balance beginning |  | $ (10,667) | $ (12,596)
Reclassifications to earnings |  | 169 | 164
Other comprehensive income |  | 169 | 164
Balance ending |  | (10,498) | (12,432)
Pension Benefits [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Balance beginning |  | (15,190) | (17,797)
Reclassifications to earnings | [1] | 425 | 482
Other comprehensive income |  | 425 | 482
Balance ending |  | (14,765) | (17,315)
Post-Retirement Benefits [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Balance beginning |  | 4,523 | 5,201
Other comprehensive income |  | (256) | (318)
Balance ending |  | 4,267 | 4,883
Accumulated Defined Benefit Plans Adjustment Net Prior Service Attributable to Parent [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Amortization of net gain and prior service credits | [1] | $ (256) | $ (318)
[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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