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Employee benefit plans (Tables) | 6 Months Ended
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Jun. 30, 2025
Employee benefit plans |
Schedule of Components of Net Periodic Defined Benefit Pension Cost | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended | ​ | Six months ended
​ | ​ | June 30, | ​ | June 30,
​ |  | 2024 |  | 2025 |  | 2024 |  | 2025
​ | ​ | (In thousands)
Interest cost | ​ | $ | 365 | ​ | $ | 356 | ​ | $ | 730 | ​ | $ | 712
Expected return on plan assets | ​ | ​ | (335) | ​ | ​ | (317) | ​ | ​ | (670) | ​ | ​ | (634)
Recognized actuarial losses | ​ |  | 333 | ​ |  | 284 | ​ |  | 666 | ​ |  | 568
Total | ​ | $ | 363 | ​ | $ | 323 | ​ | $ | 726 | ​ | $ | 646

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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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