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)		1,044,922
Issuance of common stock upon exercise of stock options	7,686	$ 1	7,685
Issuance of common stock upon release of restricted stock units (in shares)		5,535,351
Issuance of common stock upon release of restricted stock units	0	$ 6	(6)
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	544,450		544,450
Other comprehensive (loss) income	13,678			13,678
Net income	197,418				197,418
Ending balance (in shares) at Jul. 31, 2023		300,956,027
Ending balance at Jul. 31, 2023	7,002,352	$ 302	4,689,521	(36,707)	2,349,236
Beginning balance (in shares) at Apr. 30, 2023		297,455,726
Beginning balance at Apr. 30, 2023	6,524,107	$ 298	4,391,418	(34,871)	2,167,262
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)		542,954
Issuance of common stock upon exercise of stock options	3,417		3,417
Issuance of common stock upon release of restricted stock units (in shares)		2,404,443
Issuance of common stock upon release of restricted stock units	0	$ 3	(3)
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	262,177		262,177
Other comprehensive (loss) income	(1,836)			(1,836)
Net income	181,974				181,974
Ending balance (in shares) at Jul. 31, 2023		300,956,027
Ending balance at Jul. 31, 2023	7,002,352	$ 302	4,689,521	(36,707)	2,349,236
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)	221,827	221,827
Issuance of common stock upon exercise of stock options	$ 1,855		1,855
Issuance of common stock upon release of restricted stock units (in shares)		6,778,788
Issuance of common stock upon release of restricted stock units	0	$ 7	(7)
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)		(7,229,395)
Repurchases of common stock	(437,693)	$ (7)	(437,686)
Stock-based compensation expense	470,965		470,965
Other comprehensive (loss) income	1,128			1,128
Net income	435,323				435,323
Ending balance (in shares) at Jul. 31, 2024		307,995,624
Ending balance at Jul. 31, 2024	8,525,247	$ 308	5,298,145	2,191	3,224,603
Beginning balance (in shares) at Apr. 30, 2024		309,268,684
Beginning balance at Apr. 30, 2024	8,298,824	$ 309	5,310,417	(17,490)	3,005,588
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)		112,363
Issuance of common stock upon exercise of stock options	839		839
Issuance of common stock upon release of restricted stock units (in shares)		2,777,616
Issuance of common stock upon release of restricted stock units	0	$ 3	(3)
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)		(4,829,090)
Repurchases of common stock	(287,645)	$ (5)	(287,640)
Stock-based compensation expense	240,270		240,270
Other comprehensive (loss) income	19,681			19,681
Net income	219,015				219,015
Ending balance (in shares) at Jul. 31, 2024		307,995,624
Ending balance at Jul. 31, 2024	$ 8,525,247	$ 308	$ 5,298,145	$ 2,191	$ 3,224,603