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Income Taxes - Roll-forward of Unrecognized Tax Benefits and Associated Accrued Interest and Penalties (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Income Tax Contingency [Line Items]      
Opening balance at January 1 $ 0 $ 14,800,000 $ 13,400,000
Reductions for tax positions of prior periods 0 (15,600,000) 0
Additions for tax positions of prior periods 0 800,000 1,400,000
Closing balance at December 31 0 0 14,800,000
Current 0 0 (1,200,000)
Non-current 0 0 13,600,000
Unrecognized Tax Benefits [Member]      
Income Tax Contingency [Line Items]      
Opening balance at January 1 0 10,500,000 10,200,000
Reductions for tax positions of prior periods 0 (10,500,000) 0
Additions for tax positions of prior periods 0 0 300,000
Closing balance at December 31 0 0 10,500,000
Current 0 0 (1,000,000)
Non-current 0 0 9,500,000
Interest and Penalties [Member]      
Income Tax Contingency [Line Items]      
Opening balance at January 1 0 4,300,000 3,200,000
Reductions for tax positions of prior periods   (5,100,000) 0
Additions for tax positions of prior periods   800,000 1,100,000
Closing balance at December 31 0 0 4,300,000
Current 0 0 (200,000)
Non-current $ 0 $ 0 $ 4,100,000