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Employee Benefit Plans (Tables) | 9 Months Ended
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Sep. 25, 2022
Retirement Benefits [Abstract] |
Schedule of Components of Net Periodic Benefit Costs | Components of net periodic benefit (income) cost for the Company's defined benefit plans were as follows (in thousands):
| Three months ended |  | Nine months ended
| September 25, 2022 |  | September 26, 2021 |  | September 25, 2022 |  | September 26, 2021
Pension and SERPA Benefits: |  |  |  |  |  |  |
Service cost | $ | 4,763 |  |  | $ | 6,348 |  |  | $ | 14,289 |  |  | $ | 19,044 |
Interest cost | 15,473 |  |  | 15,472 |  |  | 46,418 |  |  | 46,412 |
Expected return on plan assets | (31,476) |  |  | (32,720) |  |  | (94,428) |  |  | (98,160) |
Amortization of unrecognized: |  |  |  |  |  |  |
Prior service credit | (328) |  |  | (312) |  |  | (984) |  |  | (936) |
Net loss | 7,978 |  |  | 18,386 |  |  | 23,934 |  |  | 55,158 |
Settlement (gain) loss | — |  |  | — |  |  | (256) |  |  | 816 |
Net periodic benefit (income) cost | $ | (3,590) |  |  | $ | 7,174 |  |  | $ | (11,027) |  |  | $ | 22,334 |
Postretirement Healthcare Benefits: |  |  |  |  |  |  |
Service cost | $ | 1,161 |  |  | $ | 1,288 |  |  | $ | 3,482 |  |  | $ | 3,864 |
Interest cost | 1,904 |  |  | 1,626 |  |  | 5,712 |  |  | 4,878 |
Expected return on plan assets | (3,809) |  |  | (3,495) |  |  | (11,427) |  |  | (10,485) |
Amortization of unrecognized: |  |  |  |  |  |  |
Prior service credit | (581) |  |  | (581) |  |  | (1,743) |  |  | (1,743) |
Net loss | 122 |  |  | 264 |  |  | 366 |  |  | 792 |
Net periodic benefit income | $ | (1,203) |  |  | $ | (898) |  |  | $ | (3,610) |  |  | $ | (2,694) |

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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