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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Tax Credit Carryforward [Line Items] |  |  |  |
Deferred Tax Assets, Valuation Allowance |  | $ 8.0 | $ 7.6 |
Deferred Tax Assets, Tax Credit Carryforwards |  | 9.6 | 8.6 |
Deferred Income Tax Assets, Net | [1] | 1.7 | 0.8 |
Deferred tax liabilities and other long-term obligations |  | 89.7 | 36.0 |
Deferred Tax Liabilities, Other |  | 0.7 | 1.2 |
Deferred Tax Liabilities, Tax Deferred Expense, Compensation and Benefits Pension and Other Postretirement Benefits |  | 0.0 | (0.5) |
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit |  |  | $ 10.4 | $ 68.4
Valuation allowances, State Tax Credits [Member] |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount |  | $ 2.6 |  |
[1] | Included in "Other assets, net" on our accompanying December 31, 2024 and 2023 Consolidated Balance Sheets.

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