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Pension Benefits and Other Postretirement Benefits (Tables) | 3 Months Ended
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Mar. 31, 2023
Retirement Benefits [Abstract] |
Schedule of Components of Net Periodic Benefit Cost | The components of net periodic benefit (credit) cost were as follows:
| Pension Benefits |  |  |  |  |  | Other Postretirement Benefits |  |  |  |
| Three Months Ended |  |  |  | Three Months Ended |  |
| March 31, |  |  |  | March 31, |  |
(Dollars in thousands) | 2023 |  | 2022 |  |  |  |  |  | 2023 |  | 2022 |  |  |  |
Service cost | $ | — |  |  | $ | — |  |  |  |  |  |  | $ | 19 |  |  | $ | 10 |  |  |  |  |
Interest cost | 268 |  |  | 191 |  |  |  |  |  |  | 17 |  |  | 8 |  |  |  |  |
Expected return of plan assets | (356) |  |  | (340) |  |  |  |  |  |  | — |  |  | — |  |  |  |  |
Amortization of prior service credit | — |  |  | — |  |  |  |  |  |  | — |  |  | — |  |  |  |  |
Amortization of net loss (gain) | 122 |  |  | 111 |  |  |  |  |  |  | (2) |  |  | — |  |  |  |  |
Net periodic benefit (credit) cost | $ | 34 |  |  | $ | (38) |  |  |  |  |  |  | $ | 34 |  |  | $ | 18 |  |  |  |  |

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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