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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 | 9 Months Ended
--- | --- | ---
Jun. 29, 2024 | Jun. 24, 2023 | Jun. 29, 2024 | Jun. 24, 2023
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |  |
Balance beginning |  |  |  | $ (10,667) |
Recognition in earnings of net actuarial loss for pension settlement |  | $ 550 | $ 0 | 550 | $ 0
Other comprehensive income |  | 719 | 164 | 1,057 | 491
Balance ending |  | (9,610) |  | (9,610) |
Pension Benefits [Member] |  |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |  |
Balance beginning |  | (14,339) | (16,834) | (15,190) | (17,797)
Reclassifications to earnings | [1] | 425 | 482 | 1,276 | 1,445
Recognition in earnings of net actuarial loss for pension settlement | [1] | 550 | 0 | 550 | 0
Other comprehensive income |  | 975 | 482 | 1,826 | 1,445
Balance ending |  | (13,364) | (16,352) | (13,364) | (16,352)
Post-Retirement Benefits [Member] |  |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |  |
Balance beginning |  | 4,010 | 4,565 | 4,523 | 5,201
Amortization of net gain and prior service credits | [1] | (256) | (318) | (769) | (954)
Other comprehensive income |  | (256) | (318) | (769) | (954)
Balance ending |  | 3,754 | 4,247 | 3,754 | 4,247
Accumulated Other Comprehensive Income (Loss) [Member] |  |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |  |
Balance beginning |  | (10,329) | (12,269) | (10,667) | (12,596)
Reclassifications to earnings |  | 169 | 164 | 507 | 491
Recognition in earnings of net actuarial loss for pension settlement |  | 550 | 0 | 550 | 0
Other comprehensive income |  | 719 | 164 | 1,057 | 491
Balance ending |  | $ (9,610) | $ (12,105) | $ (9,610) | $ (12,105)
[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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