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Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Goodwill [Line Items] |  |  |  |  |
Amortization expense associated with identifiable intangible assets | $ 5.5 | $ 5.0 | $ 14.7 | $ 15.0 |
Estimated total amortization expense 2025 | 20.1 |  | 20.1 |  |
Estimated total amortization expense 2026 | 19.7 |  | 19.7 |  |
Estimated total amortization expense 2027 | 18.3 |  | 18.3 |  |
Estimated total amortization expense 2028 | 16.8 |  | 16.8 |  |
Estimated total amortization expense 2029 | 15.8 |  | 15.8 |  |
Indefinite-lived Intangible Assets [Member] |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill and intangible assets with indefinite lives | $ 283.7 |  | $ 283.7 |  | $ 236.7

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