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Retirement Benefits | 6 Months Ended
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Jun. 28, 2024
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract] |
Retirement Benefits | Retirement Benefits The components of net periodic benefit cost for retirement benefit plans were as follows (in thousands):
| Three Months Ended |  | Six Months Ended
| June 28, 2024 |  | June 30, 2023 |  | June 28, 2024 |  | June 30, 2023
Pension Benefits |  |  |  |  |  |  |
Service cost | $ | 1,253 |  |  | $ | 1,467 |  |  | $ | 2,720 |  |  | $ | 2,931 |
Interest cost | 2,204 |  |  | 3,798 |  |  | 4,634 |  |  | 7,575 |
Expected return on assets | (2,623) |  |  | (3,980) |  |  | (5,067) |  |  | (7,955) |
Amortization and other | 707 |  |  | 415 |  |  | 1,643 |  |  | 855 |
Net periodic benefit cost | $ | 1,541 |  |  | $ | 1,700 |  |  | $ | 3,930 |  |  | $ | 3,406 |
Postretirement Medical |  |  |  |  |  |  |
Service cost | $ | 67 |  |  | $ | 100 |  |  | $ | 167 |  |  | $ | 200 |
Interest cost | 256 |  |  | 210 |  |  | 556 |  |  | 420 |
Amortization | (28) |  |  | 90 |  |  | (53) |  |  | 180 |
Net periodic benefit cost | $ | 295 |  |  | $ | 400 |  |  | $ | 670 |  |  | $ | 800 |

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- Definition Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 20 -Topic 715 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-3 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-4 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-2 + Details
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