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Net Income (Loss) Per Ordinary Share - Calculation of Basic and Diluted Net Income (Loss) Per Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Sep. 30, 2025
Sep. 30, 2024
Numerator:                
Net income (loss) $ (36,541) $ (125,767) $ (60,195) $ (59,001) $ 66,886 $ (72,239) $ (222,503) $ (64,354)
Denominator:                
Weighted-average ordinary shares outstanding used in per share calculations- basic (in shares) 53,830     53,790     53,828 53,757
Weighted-average ordinary shares outstanding used in per share calculations- diluted (in shares) 53,830     53,790     53,828 53,757
Net Income (Loss) Per Share, Basic and Diluted                
Basic (in dollars per share) $ (0.68)     $ (1.10)     $ (4.13) $ (1.20)
Diluted (in dollars per share) $ (0.68)     $ (1.10)     $ (4.13) $ (1.20)