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Benefit Plans (Tables) | 9 Months Ended
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Sep. 30, 2024
Retirement Benefits [Abstract] |
Components of net periodic benefit cost | Tables 10.1 and 10.2 provide the components of net periodic benefit cost for our pension, supplemental executive retirement and other postretirement benefit plans for the three and nine months ended September 30, 2024 and 2023.
Components of net periodic benefit cost
Table | 10.1 |  |  |  |  |  |  |  |
|  | Three Months Ended September 30,
|  | Pension and Supplemental Executive Retirement Plans |  | Other Postretirement Benefit Plans
(In thousands) |  | 2024 |  | 2023 |  | 2024 |  | 2023
Company service cost |  | $ | — |  |  | $ | — |  |  | $ | 417 |  |  | $ | 374 |
Interest cost |  | 3,247 |  |  | 3,297 |  |  | 376 |  |  | 409 |
Expected return on plan assets |  | (3,644) |  |  | (3,426) |  |  | (2,493) |  |  | (2,059) |
Amortization of: |  |  |  |  |  |  |  |
Net actuarial losses (gains) |  | 522 |  |  | 529 |  |  | (382) |  |  | (38) |
Prior service cost (credit) |  | 87 |  |  | 87 |  |  | 454 |  |  | 465 |
Cost of settlements and curtailments |  | — |  |  | 334 |  |  | — |  |  | — |
Net periodic benefit cost (benefit) |  | $ | 212 |  |  | $ | 821 |  |  | $ | (1,628) |  |  | $ | (849) |
Components of net periodic benefit cost
Table | 10.2 |  |  |  |  |  |  |  |
|  | Nine Months Ended September 30,
|  | Pension and Supplemental Executive Retirement Plans |  | Other Postretirement Benefit Plans
(In thousands) |  | 2024 |  | 2023 |  | 2024 |  | 2023
Company service cost |  | $ | — |  |  | $ | — |  |  | $ | 1,251 |  |  | $ | 1,122 |
Interest cost |  | 9,741 |  |  | 10,278 |  |  | 1,126 |  |  | 1,225 |
Expected return on plan assets |  | (10,932) |  |  | (10,432) |  |  | (7,481) |  |  | (6,176) |
Amortization of: |  |  |  |  |  |  |  |
Net actuarial losses (gains) |  | 1,568 |  |  | 1,656 |  |  | (1,142) |  |  | (113) |
Prior service cost (credit) |  | 259 |  |  | 259 |  |  | 1,360 |  |  | 1,396 |
Cost of settlements and curtailments |  | — |  |  | 9,181 |  |  | — |  |  | — |
Net periodic benefit cost (benefit) |  | $ | 636 |  |  | $ | 10,942 |  |  | $ | (4,886) |  |  | $ | (2,546) |

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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