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Retirement Plans and Other Post-Retirement Benefits | 6 Months Ended
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Jun. 30, 2021
Compensation And Retirement Disclosure [Abstract] |
Retirement Plans and Other Post-Retirement Benefits |
1 2. | RETIREMENT PLANS AND OTHER POST-RETIREMENT BENEFITS
The following tables provide information with respect to the net periodic costs of our pension and post-retirement medical benefit plans included in continuing operations.
|  | Three months ended June 30 |  |  | Six months ended June 30
In thousands |  | 2021 |  |  |  | 2020 |  |  | 2021 |  |  |  | 2020 |  |
Pension Benefits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | — |  |  |  | $ | 48 |  |  | $ | — |  |  |  | $ | 92 |  |
Interest cost |  |  | 273 |  |  |  |  | 300 |  |  |  | 523 |  |  |  |  | 601 |  |
Amortization of prior service cost |  |  | 12 |  |  |  |  | 11 |  |  |  | 24 |  |  |  |  | 23 |  |
Amortization of actuarial loss |  |  | 199 |  |  |  |  | 161 |  |  |  | 398 |  |  |  |  | 321 |  |
Total net periodic benefit expense |  | $ | 484 |  |  |  | $ | 520 |  |  | $ | 945 |  |  |  | $ | 1,037 |  |
Other Benefits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 7 |  |  |  | $ | 7 |  |  | $ | 14 |  |  |  | $ | 14 |  |
Interest cost |  |  | 32 |  |  |  |  | 46 |  |  |  | 64 |  |  |  |  | 92 |  |
Amortization of prior service credit |  |  | (59 | ) |  |  |  | (116 | ) |  |  | (117 | ) |  |  |  | (232 | ) |
Amortization of actuarial loss |  |  | 12 |  |  |  |  | (208 | ) |  |  | 24 |  |  |  |  | (417 | ) |
Total net periodic benefit income |  | $ | (8 | ) |  |  | $ | (271 | ) |  | $ | (15 | ) |  |  | $ | (543 | ) |

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