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Pension and Other Postretirement Obligations | 3 Months Ended
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Mar. 31, 2019
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 |  | March 31, 2019 |  | April 1, 2018 |  | March 31, 2019 |  | April 1, 2018
|  | (In thousands)
Service cost |  | $ | 1,058 |  |  | $ | 1,133 |  |  | $ | 10 |  |  | $ | 13 |
Interest cost |  | 3,010 |  |  | 1,876 |  |  | 272 |  |  | 264 |
Expected return on plan assets |  | (4,116 | ) |  | (2,520 | ) |  | — |  |  | — |
Amortization of prior service credit |  | (14 | ) |  | (10 | ) |  | — |  |  | — |
Actuarial losses (gains) |  | 327 |  |  | 665 |  |  | (26 | ) |  | — |
Net periodic benefit cost |  | $ | 265 |  |  | $ | 1,144 |  |  | $ | 256 |  |  | $ | 277 |

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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