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Retirement Plans and Other Postretirement Benefits (Tables) | 9 Months Ended
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Sep. 30, 2025
Retirement Benefits [Abstract] |
Components of Net Periodic Benefit Cost (Income) | Information with respect to the Retirement Plans and Other Postretirement Benefits follows:
| Three Months Ended September 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
(Dollars in thousands) | Retirement Plans |  | Other Post Retirement Benefits
Service cost | $ | 137 |  |  | $ | 141 |  |  | $ | 10 |  |  | $ | 14 |
Interest cost | 604 |  |  | 596 |  |  | 27 |  |  | 27 |
Expected loss on plan assets | (895) |  |  | (870) |  |  | — |  |  | — |
Amortization of net actuarial loss (gain) | 64 |  |  | 175 |  |  | (27) |  |  | (28) |
Net periodic benefit (income) cost | $ | (90) |  |  | $ | 42 |  |  | $ | 10 |  |  | $ | 13 |
| Nine Months Ended September 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
(Dollars in thousands) | Retirement Plans |  | Other Post Retirement Benefits
Service cost | $ | 411 |  |  | $ | 424 |  |  | $ | 32 |  |  | $ | 42 |
Interest cost | 1,812 |  |  | 1,788 |  |  | 81 |  |  | 81 |
Expected loss on plan assets | (2,685) |  |  | (2,610) |  |  | — |  |  | — |
Amortization of net actuarial loss (gain) | 188 |  |  | 526 |  |  | (76) |  |  | (85) |
Net periodic benefit (income) cost | $ | (274) |  |  | $ | 128 |  |  | $ | 37 |  |  | $ | 38 |

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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://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (q) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: 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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