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Pension Plan | 6 Months Ended
--- | ---
Jun. 30, 2024
Retirement Benefits [Abstract] |
Pension Plan | Pension Plan Net periodic pension cost consists of the following:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2024 |  | 2023 |  | 2024 |  | 2023
Service cost | $ | 180 |  |  | $ | 194 |  |  | $ | 360 |  |  | $ | 388 |
Interest cost on projected benefit obligation | 863 |  |  | 911 |  |  | 1,726 |  |  | 1,822 |
Expected return on plan assets | (1,101) |  |  | (1,032) |  |  | (2,202) |  |  | (2,064) |
Net amortization and deferral | 398 |  |  | 532 |  |  | 797 |  |  | 1,064 |
Net periodic pension cost | $ | 340 |  |  | $ | 605 |  |  | $ | 681 |  |  | $ | 1,210 |
We do not expect to make any pension contributions during 2024. Non-service pension cost was immaterial for the three and six months ended June 30, 2024 and 2023.

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