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Retirement Plans (Tables) | 3 Months Ended
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Mar. 30, 2019
Retirement Benefits [Abstract] |
Defined Benefit Plan, Net Periodic Benefit Cost | The summary of the components of net periodic pension costs for the plans for the three months ended March 30, 2019 and March 31, 2018 is as follows (in thousands):
|  | Three Months Ended |
|  | March 30, 2019 |  |  | March 31, 2018 |
|  | U.S. Pension Plans |  |  | U.S. Retiree Healthcare Plan |  |  | Non-U.S. Pension Plans |  |  | U.S. Pension Plans |  |  | U.S. Retiree Healthcare Plan |  |  | Non-U.S. Pension Plans |
Service cost |  | $ | — |  |  | $ | 142 |  |  | $ | 1,082 |  |  | $ | 142 |  |  | $ | 132 |  |  | $ | 1,374 |
Interest cost |  |  | 13 |  |  |  | 159 |  |  |  | 434 |  |  |  | 1,619 |  |  |  | 156 |  |  |  | 428 |
Expected return on plan assets |  |  | — |  |  |  | (177 | ) |  |  | (543 | ) |  |  | (2,785 | ) |  |  | (178 | ) |  |  | (493 | )
Net amortization: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prior service credit |  |  | — |  |  |  | (5 | ) |  |  | (37 | ) |  |  | — |  |  |  | (8 | ) |  |  | (31 | )
Net actuarial loss |  |  | — |  |  |  | — |  |  |  | 135 |  |  |  | 769 |  |  |  | — |  |  |  | 177 |
Net periodic pension cost (benefit) |  | $ | 13 |  |  | $ | 119 |  |  | $ | 1,071 |  |  | $ | (255 | ) |  | $ | 102 |  |  | $ | 1,455 |

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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 http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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