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Retirement Plans and Other Post-Retirement Benefits | 9 Months Ended
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Sep. 30, 2021
Retirement Benefits [Abstract] |
Retirement Plans and Other Post-Retirement Benefits | RETIREMENT PLANS AND OTHER POST-RETIREMENT BENEFITSThe 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 September 30 |  | Nine months ended September 30
In thousands | 2021 |  | 2020 |  | 2021 |  | 2020
Pension Benefits |  |  |  |  |  |  |
Service cost | $ | — |  |  | $ | 61 |  |  | $ | — |  |  | $ | 153 |
Interest cost | 266 |  |  | 318 |  |  | 789 |  |  | 919 |
Amortization of prior service cost | 12 |  |  | 12 |  |  | 36 |  |  | 35 |
Amortization of actuarial loss | 199 |  |  | 164 |  |  | 597 |  |  | 485 |
Total net periodic benefit expense | $ | 477 |  |  | $ | 555 |  |  | $ | 1,422 |  |  | $ | 1,592 |
Other Benefits |  |  |  |  |  |  |
Service cost | $ | 8 |  |  | $ | 8 |  |  | $ | 22 |  |  | $ | 22 |
Interest cost | 31 |  |  | 46 |  |  | 95 |  |  | 138 |
Amortization of prior service credit | (58) |  |  | (115) |  |  | (175) |  |  | (347) |
Amortization of actuarial loss (gains) | 11 |  |  | (209) |  |  | 35 |  |  | (626) |
Total net periodic benefit income | $ | (8) |  |  | $ | (270) |  |  | $ | (23) |  |  | $ | (813) |

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