Pension and other postretirement benefits - Expected benefit payments (Detail) $ in Thousands	Dec. 31, 2024 USD ($)
Pension
Schedule Of Pension Expected Future Benefit Payments [Line Items]
2025	$ 2,080
2026	2,114
2027	2,014
2028	2,086
2029	2,174
Years 2030 — 2034	10,693
Other Benefits
Schedule Of Pension Expected Future Benefit Payments [Line Items]
2025	1,022
2026	756
2027	602
2028	574
2029	563
Years 2030 — 2034	$ 2,488

Schedule of Pension Expected Future Benefit Payments [Line Items]

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- Definition

Amount of benefit for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following current fiscal year.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

+ Details

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- Definition

Amount of benefit for defined benefit plan expected to be paid in next fiscal year following current fiscal year.

+ References

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- Definition

Amount of benefit for defined benefit plan expected to be paid in fifth fiscal year following current fiscal year.

+ References

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Amount of benefit for defined benefit plan expected to be paid in fourth fiscal year following current fiscal year.

+ References

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Amount of benefit for defined benefit plan expected to be paid in third fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in second fiscal year following current fiscal year.

+ References

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