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Accumulated Other Comprehensive Income (Loss) (Tables) | 3 Months Ended
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Mar. 28, 2025
Equity [Abstract] |
Summary of Accumulated Other Comprehensive (Loss) | Following is a summary of AOCI(L) for the first quarter of 2025 and the first quarter of 2024:
(in thousands) |  | December 31, 2024 |  | Pre-tax Activity |  | Tax Effect |  | March 28, 2025
Net pension activity: |  |  |  |  |  |  |  |
Actuarial gain |  | $ | 4,418 |  |  | $ | (9) |  |  | $ | 3 |  |  | $ | 4,412 |
Prior service costs |  | (85) |  |  | 4 |  |  | (1) |  |  | (82) |
Net postretirement benefits activity: |  |  |  |  |  |  |  |
Actuarial gain |  | 2,960 |  |  | — |  |  | — |  |  | 2,960 |
Prior service costs |  | (624) |  |  | — |  |  | — |  |  | (624) |
Unrealized gain on short-term investments |  | 25 |  |  | (14) |  |  | 3 |  |  | 14 |
Reclassification of stranded tax effects |  | (4,809) |  |  | — |  |  | — |  |  | (4,809) |
Total AOCI(L) |  | $ | 1,885 |  |  | $ | (19) |  |  | $ | 5 |  |  | $ | 1,871 |
(in thousands) |  | December 31, 2023 |  | Pre-tax Activity |  | Tax Effect |  | March 29, 2024
Net pension activity: |  |  |  |  |  |  |  |
Actuarial gain |  | $ | 533 |  |  | $ | — |  |  | $ | — |  |  | $ | 533 |
Prior service costs |  | (97) |  |  | 4 |  |  | (1) |  |  | (94) |
Net postretirement benefits activity: |  |  |  |  |  |  |  |
Actuarial gain |  | 721 |  |  | 26 |  |  | (6) |  |  | 741 |
Prior service costs |  | (624) |  |  | — |  |  | — |  |  | (624) |
Unrealized loss on short-term investments |  | — |  |  | (232) |  |  | 56 |  |  | (176) |
Reclassification of stranded tax effects |  | (4,809) |  |  | — |  |  | — |  |  | (4,809) |
Total AOCI(L) |  | $ | (4,276) |  |  | $ | (202) |  |  | $ | 49 |  |  | $ | (4,429) |

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-14A Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481674/830-30-50-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481694/830-30-45-20 + Details
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