Net Income per Share Attributable to Common Stockholders - Schedule of Calculation of Basic and Diluted Net Income Per Share Attributable to Common Stockholders (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2024
Numerator:
Net income attributable to common stockholders, basic	$ 309,085	$ 1,067,885	$ 73,980
Add: Interest expense on convertible senior notes	0	0	425
Net income attributable to common stockholders, diluted	$ 309,085	$ 1,067,885	$ 74,405
Denominator:
Weighted-average common shares outstanding, basic (in shares)	202,079	204,329	204,070
Effect of dilutive securities (in shares)	7,039	6,010	4,880
Weighted-average common shares outstanding, diluted (in shares)	209,118	210,339	208,950
Net income per share attributable to common stockholders:
Basic (in usd per share)	$ 1.53	$ 5.23	$ 0.36
Diluted (in usd per share)	$ 1.48	$ 5.08	$ 0.36