Inventory - Summary of Components of Inventory (Detail) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Inventory Disclosure [Abstract]
Raw materials	$ 132,256	$ 141,278
Work in progress	883,808	892,689
Finished goods	60,633	65,320
Total inventory	$ 1,076,697	$ 1,099,287