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Pension and post-retirement benefit obligations (Tables) | 9 Months Ended
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Sep. 30, 2025
Retirement Benefits [Abstract] |
Schedule of Net Benefit Costs | The net periodic benefit cost for the three and nine months ended September 30, 2025 and 2024 is as follows:
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
(in thousands) |  | 2025 |  | 2024 |  | 2025 |  | 2024
Net periodic benefit cost: |  |  |  |  |  |  |  |
Service cost |  | $ | 208 |  |  | $ | 185 |  |  | $ | 605 |  |  | $ | 532 |
Interest cost |  | 28 |  |  | 40 |  |  | 81 |  |  | 115 |
Expected return on plan assets |  | (72) |  |  | (63) |  |  | (209) |  |  | (181) |
Amortization of prior service cost |  | (47) |  |  | (44) |  |  | (136) |  |  | (125) |
Amortization of actuarial losses |  | 5 |  |  | — |  |  | 15 |  |  | — |
Net periodic benefit cost |  | $ | 122 |  |  | $ | 118 |  |  | $ | 356 |  |  | $ | 341 |

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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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