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v3.23.1

Benefit Plans | 3 Months Ended
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Mar. 31, 2023
Retirement Benefits [Abstract] |
Benefit Plans | Benefit Plans Table 10.1 provides the components of net periodic benefit cost for our pension, supplemental executive retirement and other postretirement benefit plans for the three months ended March 31, 2023 and 2022.
Components of net periodic benefit cost
Table | 10.1 |  |  |  |  |  |  |  |
|  | Three Months Ended March 31,
|  | Pension and Supplemental Executive Retirement Plans |  | Other Postretirement Benefit Plans
(In thousands) |  | 2023 |  | 2022 |  | 2023 |  | 2022
Company service cost |  | $ | — |  |  | $ | 1,757 |  |  | $ | 386 |  |  | $ | 348 |
Interest cost |  | 3,682 |  |  | 2,877 |  |  | 398 |  |  | 177 |
Expected return on plan assets |  | (3,581) |  |  | (4,952) |  |  | (2,063) |  |  | (2,625) |
Amortization of: |  |  |  |  |  |  |  |
Net actuarial losses (gains) |  | 597 |  |  | 1,183 |  |  | (64) |  |  | (754) |
Prior service cost (credit) |  | 86 |  |  | (53) |  |  | 465 |  |  | 122 |
Cost of settlements and curtailments |  | 7,847 |  |  | — |  |  | — |  |  | — |
Net periodic benefit cost (benefit) |  | $ | 8,631 |  |  | $ | 812 |  |  | $ | (878) |  |  | $ | (2,732) |
Effective January 1, 2023, the defined benefit pension plan and supplemental executive retirement plan are frozen (no future benefits will be accrued for participants due to employment and no new participants will be added). Participants in these plans are fully vested in their benefits.

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