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Accumulated Other Comprehensive Income (Loss) (Tables) | 9 Months Ended
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Sep. 26, 2025
Equity [Abstract] |
Summary of Accumulated Other Comprehensive (Loss) | Following is a summary of AOCI(L) for the third quarter of 2025 and the third quarter of 2024:
|  |  |  | Gains (Losses) During the Period |  | Reclassification to Income |  |
(in thousands) |  | June 27, 2025 |  | Pre-tax Activity |  | Tax Effect |  | Pre-tax Activity |  | Tax Effect |  | September 26, 2025
Net pension activity: |  |  |  |  |  |  |  |  |  |  |  |
Actuarial gain |  | $ | 4,406 |  |  | $ | — |  |  | $ | — |  |  | $ | (9) |  |  | $ | 3 |  |  | $ | 4,400 |
Prior service costs |  | (79) |  |  | — |  |  | — |  |  | 4 |  |  | (1) |  |  | (76) |
Net postretirement benefits activity: |  |  |  |  |  |  |  |  |  |  |  |
Actuarial gain |  | 2,960 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 2,960 |
Prior service costs |  | (624) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (624) |
Unrealized (loss) gain on short-term investments |  | (15) |  |  | 71 |  |  | (17) |  |  | 12 |  |  | (3) |  |  | 48 |
Reclassification of stranded tax effects |  | (4,809) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (4,809) |
Total AOCI(L) |  | $ | 1,839 |  |  | $ | 71 |  |  | $ | (17) |  |  | $ | 7 |  |  | $ | (1) |  |  | $ | 1,899 |
|  |  |  | Gains (Losses) During the Period |  | Reclassification to Income |  |
(in thousands) |  | June 28, 2024 |  | Pre-tax Activity |  | Tax Effect |  | Pre-tax Activity |  | Tax Effect |  | September 27, 2024
Net pension activity: |  |  |  |  |  |  |  |  |  |  |  |
Actuarial gain |  | $ | 533 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 533 |
Prior service costs |  | (91) |  |  | — |  |  | — |  |  | 4 |  |  | (1) |  |  | (88) |
Net postretirement benefits activity: |  |  |  |  |  |  |  |  |  |  |  |
Actuarial gain |  | 761 |  |  | — |  |  | — |  |  | 26 |  |  | (6) |  |  | 781 |
Prior service costs |  | (624) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (624) |
Unrealized (loss) gain on short-term investments |  | (173) |  |  | 566 |  |  | (138) |  |  | — |  |  | — |  |  | 255 |
Reclassification of stranded tax effects |  | (4,809) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (4,809) |
Total AOCI(L) |  | $ | (4,403) |  |  | $ | 566 |  |  | $ | (138) |  |  | $ | 30 |  |  | $ | (7) |  |  | $ | (3,952) |
Following is a summary of AOCI(L) for the first nine months of 2025 and the first nine months of 2024:
|  |  |  | Gains (Losses) During the Period |  | Reclassification to Income |  |
(in thousands) |  | December 31, 2024 |  | Pre-tax Activity |  | Tax Effect |  | Pre-tax Activity |  | Tax Effect |  | September 26, 2025
Net pension activity: |  |  |  |  |  |  |  |  |  |  |  |
Actuarial gain |  | $ | 4,418 |  |  | $ | — |  |  | $ | — |  |  | $ | (27) |  |  | $ | 9 |  |  | $ | 4,400 |
Prior service costs |  | (85) |  |  | — |  |  | — |  |  | 12 |  |  | (3) |  |  | (76) |
Net postretirement benefits activity: |  |  |  |  |  |  |  |  |  |  |  | — |
Actuarial gain |  | 2,960 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 2,960 |
Prior service costs |  | (624) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (624) |
Unrealized gain on short-term investments |  | 25 |  |  | 20 |  |  | (6) |  |  | 12 |  |  | (3) |  |  | 48 |
Reclassification of stranded tax effects |  | (4,809) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (4,809) |
Total AOCI(L) |  | $ | 1,885 |  |  | $ | 20 |  |  | $ | (6) |  |  | $ | (3) |  |  | $ | 3 |  |  | $ | 1,899 |
|  |  |  | Gains (Losses) During the Period |  | Reclassification to Income |  |
(in thousands) |  | December 31, 2023 |  | Pre-tax Activity |  | Tax Effect |  | Pre-tax Activity |  | Tax Effect |  | September 27, 2024
Net pension activity: |  |  |  |  |  |  |  |  |  |  |  |
Actuarial gain |  | $ | 533 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 533 |
Prior service costs |  | (97) |  |  | — |  |  | — |  |  | 12 |  |  | (3) |  |  | (88) |
Net postretirement benefits activity: |  |  |  |  |  |  |  |  |  |  |  |
Actuarial gain |  | 721 |  |  | — |  |  | — |  |  | 78 |  |  | (18) |  |  | 781 |
Prior service costs |  | (624) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (624) |
Unrealized gain on short-term investments |  | — |  |  | 338 |  |  | (83) |  |  | — |  |  | — |  |  | 255 |
Reclassification of stranded tax effects |  | (4,809) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (4,809) |
Total AOCI(L) |  | $ | (4,276) |  |  | $ | 338 |  |  | $ | (83) |  |  | $ | 90 |  |  | $ | (21) |  |  | $ | (3,952) |

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