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Pension and Other Postretirement Obligations | 6 Months Ended
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Jun. 28, 2020
Retirement Benefits [Abstract] |
Pension and Other Postretirement Obligations | Pension and Other Postretirement Obligations The following table provides the components of net periodic benefit costs for our pension and other postretirement benefit plans:
|  | Pension Obligations |  |  |  | Other Postretirement Obligations |  |
Three Months Ended |  | June 28, 2020 |  | June 30, 2019 |  | June 28, 2020 |  | June 30, 2019
|  | (In thousands) |  |  |  |  |  |
Service cost |  | $ | 892 |  |  | $ | 967 |  |  | $ | 8 |  |  | $ | 10 |
Interest cost |  | 2,410 |  |  | 2,918 |  |  | 195 |  |  | 270 |
Expected return on plan assets |  | (4,004) |  |  | (4,020) |  |  | — |  |  | — |
Amortization of prior service cost |  | 45 |  |  | 40 |  |  | — |  |  | — |
Actuarial losses (gains) |  | 673 |  |  | 281 |  |  | (19) |  |  | (26) |
Net periodic benefit cost |  | $ | 16 |  |  | $ | 186 |  |  | $ | 184 |  |  | $ | 254 |
Six Months Ended |  |  |  |  |  |  |  |
Service cost |  | $ | 1,824 |  |  | $ | 1,974 |  |  | $ | 16 |  |  | $ | 19 |
Interest cost |  | 4,747 |  |  | 5,878 |  |  | 397 |  |  | 542 |
Expected return on plan assets |  | (7,944) |  |  | (8,137) |  |  | — |  |  | — |
Amortization of prior service cost |  | 89 |  |  | 26 |  |  | — |  |  | — |
Actuarial losses (gains) |  | 1,350 |  |  | 602 |  |  | (38) |  |  | (51) |
Net periodic benefit cost |  | $ | 66 |  |  | $ | 343 |  |  | $ | 375 |  |  | $ | 510 |

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