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Pension and Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Retirement Benefits [Abstract] |  |  |  |  |
Defined benefit plan contributions | $ 0.9 | $ 0.0 | $ 1.1 | $ 0.0 |
Unfunded liability plans | $ 3.0 |  | $ 3.0 |  | $ 4.1

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