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Pension and Postretirement Benefits | 6 Months Ended
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Jun. 30, 2019
Compensation And Retirement Disclosure [Abstract] |
Pension and Postretirement Benefits |
7. | Pension and Postretirement Benefits
The estimated components of the recorded net periodic benefit cost (credit) for pension and postretirement benefits are as follows:
|  | Pension |  |  | Postretirement Benefits |
|  | Three Months Ended June 30, |
|  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
|  | (Dollars in Thousands) |
Service cost |  | $ | 7,617 |  |  | $ | 7,684 |  |  | $ | 14 |  |  | $ | 16 |
Interest cost |  |  | 9,300 |  |  |  | 8,252 |  |  |  | 125 |  |  |  | 134 |
Expected return on assets |  |  | (11,824 | ) |  |  | (12,403 | ) |  |  | — |  |  |  | — |
Amortization of: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prior service cost (credit) |  |  | 1 |  |  |  | 26 |  |  |  | (185 | ) |  |  | (426 | )
Actuarial loss (gain) |  |  | 3,941 |  |  |  | 3,117 |  |  |  | (109 | ) |  |  | (48 | )
Net periodic benefit cost (credit) |  | $ | 9,035 |  |  | $ | 6,676 |  |  | $ | (155 | ) |  | $ | (324 | )
|  | Pension |  |  | Postretirement Benefits |
|  | Six Months Ended June 30, |
|  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
|  | (Dollars in Thousands) |
Service cost |  | $ | 15,422 |  |  | $ | 15,832 |  |  | $ | 48 |  |  | $ | 38 |
Interest cost |  |  | 18,856 |  |  |  | 16,613 |  |  |  | 281 |  |  |  | 259 |
Expected return on assets |  |  | (23,930 | ) |  |  | (23,032 | ) |  |  | — |  |  |  | — |
Amortization of: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prior service cost (credit) |  |  | 3 |  |  |  | 52 |  |  |  | (399 | ) |  |  | (1,037 | )
Actuarial loss (gain) |  |  | 7,918 |  |  |  | 6,413 |  |  |  | (248 | ) |  |  | (105 | )
Net periodic benefit cost (credit) |  | $ | 18,269 |  |  | $ | 15,878 |  |  | $ | (318 | ) |  | $ | (845 | )
The service cost component of net periodic benefit cost (credit) is included in cost of revenues – products and services and selling, general and administrative expenses. All other components are included in other nonoperating income, net, in the consolidated statements of earnings and comprehensive earnings.

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- References No definition available. + Details
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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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