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, 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
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
Repurchase of common stock, including excise taxes (in shares)		(11,606,691)
Repurchase of common stock, including excise taxes	(739,311)	$ (12)	(739,299)
Stock-based compensation expense	713,627		713,627
Other comprehensive 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)
Repurchase of common stock, including excise taxes (in shares)		(4,377,296)
Repurchase of common stock, including excise taxes	(301,618)	$ (5)	(301,613)
Stock-based compensation expense	242,662		242,662
Other comprehensive 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
Beginning balance (in shares) at Jan. 31, 2025		305,740,864
Beginning balance at Jan. 31, 2025	$ 8,935,084	$ 305	5,130,271	4,990	3,799,518
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)	706,307	706,307
Issuance of common stock upon exercise of stock options	$ 1,854		1,853
Issuance of common stock upon release of restricted stock units (in shares)		9,028,227
Issuance of common stock upon release of restricted stock units	0	$ 9	(9)
Shares withheld related to net share settlement of equity awards (in shares)		(2,541,532)
Shares withheld related to net share settlement of equity awards	(192,268)	$ (3)	(192,265)
Issuance of common stock for employee stock purchase plan (in shares)		714,513
Issuance of common stock for employee stock purchase plan	36,058	$ 1	36,057
Repurchase of common stock, including excise taxes (in shares)		(16,624,306)
Repurchase of common stock, including excise taxes	(1,302,634)	$ (17)	(1,302,617)
Stock-based compensation expense	577,305		577,305
Other comprehensive income	5,373			5,373
Net income	1,226,068				1,226,068
Ending balance (in shares) at Oct. 31, 2025		297,024,073
Ending balance at Oct. 31, 2025	9,286,840	$ 296	4,250,595	10,363	5,025,586
Beginning balance (in shares) at Jul. 31, 2025		300,120,084
Beginning balance at Jul. 31, 2025	8,950,077	$ 299	4,537,542	(477)	4,412,713
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)		234,537
Issuance of common stock upon exercise of stock options	479		478
Issuance of common stock upon release of restricted stock units (in shares)		2,449,631
Issuance of common stock upon release of restricted stock units	0	$ 2	(2)
Shares withheld related to net share settlement of equity awards (in shares)		(668,691)
Shares withheld related to net share settlement of equity awards	(54,811)	$ (1)	(54,810)
Repurchase of common stock, including excise taxes (in shares)		(5,111,488)
Repurchase of common stock, including excise taxes	(416,831)	$ (5)	(416,826)
Stock-based compensation expense	184,213		184,213
Other comprehensive income	10,840			10,840
Net income	612,873				612,873
Ending balance (in shares) at Oct. 31, 2025		297,024,073
Ending balance at Oct. 31, 2025	$ 9,286,840	$ 296	$ 4,250,595	$ 10,363	$ 5,025,586