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Pensions and Other Post-retirement Benefits - Schedule of Reconciliation of Level Three Assets (Detail) - Significant Unobservable Inputs (Level 3) - Insurance contracts - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |
Fair value of plan assets at January 1 | $ 5,622 | $ 4,454
Net realized and unrealized gains | (117) | 208
Net purchases, issuances and settlements | (2,171) | 960
Fair value of plan assets at December 31 | $ 3,334 | $ 5,622

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