CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive (Loss) Income	Retained Earnings
Beginning balance (in shares) at Jan. 31, 2023		293,822,850
Beginning balance at Jan. 31, 2023	$ 6,206,607	$ 294	$ 4,104,880	$ (50,385)	$ 2,151,818
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)		1,214,532
Issuance of common stock upon exercise of stock options	8,336	$ 1	8,335
Issuance of common stock upon release of restricted stock units (in shares)		8,747,679
Issuance of common stock upon release of restricted stock units	0	$ 9	(9)
Issuance of common stock for employee stock purchase plan (in shares)		552,904
Issuance of common stock for employee stock purchase plan	32,513	$ 1	32,512
Stock-based compensation expense	804,039		804,039
Other comprehensive (loss) income	23,276			23,276
Net income	338,630				338,630
Ending balance (in shares) at Oct. 31, 2023		304,337,965
Ending balance at Oct. 31, 2023	7,413,401	$ 305	4,949,757	(27,109)	2,490,448
Beginning balance (in shares) at Jul. 31, 2023		300,956,027
Beginning balance at Jul. 31, 2023	7,002,352	$ 302	4,689,521	(36,707)	2,349,236
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)		169,610
Issuance of common stock upon exercise of stock options	650		650
Issuance of common stock upon release of restricted stock units (in shares)		3,212,328
Issuance of common stock upon release of restricted stock units	0	$ 3	(3)
Stock-based compensation expense	259,589		259,589
Other comprehensive (loss) income	9,598			9,598
Net income	141,212				141,212
Ending balance (in shares) at Oct. 31, 2023		304,337,965
Ending balance at Oct. 31, 2023	7,413,401	$ 305	4,949,757	(27,109)	2,490,448
Beginning balance (in shares) at Jan. 31, 2024		307,558,353
Beginning balance at Jan. 31, 2024	$ 8,019,406	$ 307	5,228,756	1,063	2,789,280
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)	485,133	485,133
Issuance of common stock upon exercise of stock options	$ 3,752		3,752
Issuance of common stock upon release of restricted stock units (in shares)		9,521,433
Issuance of common stock upon release of restricted stock units	0	$ 10	(10)
Issuance of common stock for employee stock purchase plan (in shares)		666,051
Issuance of common stock for employee stock purchase plan	34,263	$ 1	34,262
Repurchases of common stock (in shares)		(11,606,691)
Repurchases of common stock	(739,311)	$ (12)	(739,299)
Stock-based compensation expense	713,627		713,627
Other comprehensive (loss) income	5,724			5,724
Net income	642,373				642,373
Ending balance (in shares) at Oct. 31, 2024		306,624,279
Ending balance at Oct. 31, 2024	8,679,834	$ 306	5,241,088	6,787	3,431,653
Beginning balance (in shares) at Jul. 31, 2024		307,995,624
Beginning balance at Jul. 31, 2024	8,525,247	$ 308	5,298,145	2,191	3,224,603
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)		263,306
Issuance of common stock upon exercise of stock options	1,897		1,897
Issuance of common stock upon release of restricted stock units (in shares)		2,742,645
Issuance of common stock upon release of restricted stock units	0	$ 3	(3)
Repurchases of common stock (in shares)		(4,377,296)
Repurchases of common stock	(301,618)	$ (5)	(301,613)
Stock-based compensation expense	242,662		242,662
Other comprehensive (loss) income	4,596			4,596
Net income	207,050				207,050
Ending balance (in shares) at Oct. 31, 2024		306,624,279
Ending balance at Oct. 31, 2024	$ 8,679,834	$ 306	$ 5,241,088	$ 6,787	$ 3,431,653