Employee benefit and stock plans - Components of Net Periodic Benefit Cost (Detail) - Pension Benefits - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Components of net periodic pension benefit: | ||
| Interest cost | $ 158 | $ 165 |
| Expected return on plan assets | (242) | (337) |
| Amortization of unrecognized net loss | 2 | 35 |
| Net periodic pension benefit | $ (82) | $ (137) |
| X | ||||||||||
- Definition The net periodic benefit cost associated with the amortization of unrecognized gain (loss) for defined benefit plans for the period. No definition available.
|
| X | ||||||||||
- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount of cost recognized for passage of time related to defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount of net periodic benefit cost (credit) for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Details
|