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Pension and Other Postretirement Benefits (Tables) | 9 Months Ended
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Sep. 30, 2024
Retirement Benefits [Abstract] |
Schedule of Components of Net Periodic Benefit Cost (Credit) | Components of net periodic benefit cost (credit) were as follows:
|  | Pension Benefits |  | Postretirement Benefits
|  | Three months ended September 30,
(in thousands) |  | 2024 |  | 2023 |  | 2024 |  | 2023
Components of net periodic benefit cost (credit) |  |  |  |  |  |  |  |
Service cost |  | $ | 1,327 |  |  | $ | 1,411 |  |  | $ | 84 |  |  | $ | 107 |
Interest cost |  | 2,645 |  |  | 2,832 |  |  | 129 |  |  | 166 |
Expected return on plan assets |  | (1,838) |  |  | (1,966) |  |  | — |  |  | — |
Settlements |  | 142 |  |  | — |  |  | — |  |  | — |
Amortization of net loss (gain) |  | 60 |  |  | 25 |  |  | (252) |  |  | (223) |
Amortization of prior service cost (credit) |  | 24 |  |  | 45 |  |  | (35) |  |  | (35) |
Net periodic benefit cost (credit) |  | $ | 2,360 |  |  | $ | 2,347 |  |  | $ | (74) |  |  | $ | 15 |
|  | Pension Benefits |  | Postretirement Benefits
|  | Nine months ended September 30,
(in thousands) |  | 2024 |  | 2023 |  | 2024 |  | 2023
Components of net periodic benefit cost (credit) |  |  |  |  |  |  |  |
Service cost |  | $ | 3,958 |  |  | $ | 4,261 |  |  | $ | 250 |  |  | $ | 322 |
Interest cost |  | 8,033 |  |  | 8,491 |  |  | 389 |  |  | 497 |
Expected return on plan assets |  | (5,510) |  |  | (5,894) |  |  | — |  |  | — |
Settlements |  | 142 |  |  | (27) |  |  | — |  |  | — |
Amortization of net loss (gain) |  | 177 |  |  | 70 |  |  | (760) |  |  | (670) |
Amortization of prior service cost (credit) |  | 70 |  |  | 137 |  |  | (103) |  |  | (103) |
Net periodic benefit cost (credit) |  | $ | 6,870 |  |  | $ | 7,038 |  |  | $ | (224) |  |  | $ | 46 |

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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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