CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings
Beginning balance (in shares) at Jan. 31, 2021		293,549,223
Beginning balance at Jan. 31, 2021	$ 3,860,767	$ 292	$ 3,187,168	$ 839	$ 672,468
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)		751,686
Issuance of common stock upon exercise of stock options	3,476	$ 1	3,475
Issuance of common stock upon release of restricted stock units (in shares)		211,036
Stock-based compensation expense	101,598		101,598
Other comprehensive income (loss)	(639)			(639)
Net income	227,531				227,531
Ending balance (in shares) at Apr. 30, 2021		294,511,945
Ending balance at Apr. 30, 2021	4,192,733	$ 293	3,292,241	200	899,999
Beginning balance (in shares) at Jan. 31, 2022		299,037,805
Beginning balance at Jan. 31, 2022	$ 5,780,018	$ 299	3,749,514	(17,902)	2,048,107
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)	543,518	543,518
Issuance of common stock upon exercise of stock options	$ 3,344	$ 1	3,343
Issuance of common stock upon release of restricted stock units (in shares)		467,160
Repurchase of common stock (in shares)		(1,224,250)
Repurchases of common stock	(132,412)	$ (1)	(132,411)
Stock-based compensation expense	210,614		210,614
Other comprehensive income (loss)	(27,335)			(27,335)
Net income	113,658				113,658
Ending balance (in shares) at Apr. 30, 2022		298,824,233
Ending balance at Apr. 30, 2022	$ 5,947,887	$ 299	$ 3,831,060	$ (45,237)	$ 2,161,765