Income Taxes - Components of the Net Income (Loss) before Provision of Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2024
Income Tax Disclosure [Abstract]
Domestic	$ 2,317,100	$ 1,238,452	$ 792,495
Foreign	105,185	77,132	39,817
Income before provision for income taxes	$ 2,422,285	$ 1,315,584	$ 832,312