CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning balance (in shares) at Jan. 31, 2023		201,904
Beginning balance at Jan. 31, 2023	$ 617,287	$ 20	$ 2,240,732	$ (1,785)	$ (22,996)	$ (1,598,684)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Settlement of convertible senior notes	104		104
Exercise of stock options (in shares)		840
Exercise of stock options	13,991		13,991
Settlement of restricted stock units (in shares)		7,523
Settlement of restricted stock units	1	$ 1
Employee stock purchase plan (in shares)		839
Employee stock purchase plan	32,993		32,993
Tax withholding on net share settlement of restricted stock units and employee stock purchase plan (in shares)		(2,722)
Tax withholding on net share settlement of restricted stock units and employee stock purchase plan	$ (142,373)		(141,994)	(379)
Repurchased of common stock (in shares)	(3,058)	(3,058)
Repurchases of common stock	$ (145,515)					(145,515)
Settlement of capped calls, net of related costs	23,688		23,688
Employee stock-based compensation	651,947		651,947
Net income	73,980					73,980
Other comprehensive income (loss), net	3,636				3,636
Ending balance (in shares) at Jan. 31, 2024		205,326
Ending balance at Jan. 31, 2024	1,129,739	$ 21	2,821,461	(2,164)	(19,360)	(1,670,219)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		1,301
Exercise of stock options	22,705		22,705
Settlement of restricted stock units (in shares)		9,275
Employee stock purchase plan (in shares)		862
Employee stock purchase plan	35,314		35,314
Tax withholding on net share settlement of restricted stock units and employee stock purchase plan (in shares)		(3,333)
Tax withholding on net share settlement of restricted stock units and employee stock purchase plan	$ (215,819)		(215,112)	(707)
Repurchased of common stock (in shares)	(10,954)	(10,954)
Repurchases of common stock	$ (684,990)	$ (1)				(684,989)
Employee stock-based compensation	656,874		656,874
Net income	1,067,885					1,067,885
Other comprehensive income (loss), net	$ (9,016)				(9,016)
Ending balance (in shares) at Jan. 31, 2025	202,477	202,477
Ending balance at Jan. 31, 2025	$ 2,002,692	$ 20	3,321,242	(2,871)	(28,376)	(1,287,323)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		75
Exercise of stock options	1,250		1,250
Settlement of restricted stock units (in shares)		9,840
Settlement of restricted stock units	1	$ 1
Employee stock purchase plan (in shares)		729
Employee stock purchase plan	40,780		40,780
Tax withholding on net share settlement of restricted stock units and employee stock purchase plan (in shares)		(3,516)
Tax withholding on net share settlement of restricted stock units and employee stock purchase plan	$ (272,807)		(272,291)	(516)
Retirement of treasury stock				3,387		(3,387)
Repurchased of common stock (in shares)	(11,840)	(11,840)
Repurchases of common stock	$ (874,859)	$ (1)				(874,858)
Employee stock-based compensation	687,014		687,014
Net income	309,085					309,085
Other comprehensive income (loss), net	$ 24,664				24,664
Ending balance (in shares) at Jan. 31, 2026	197,765	197,765
Ending balance at Jan. 31, 2026	$ 1,917,820	$ 20	$ 3,777,995	$ 0	$ (3,712)	$ (1,856,483)