Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Revenues:
Total revenues		$ 1,850,777	$ 1,465,069	$ 1,104,081
Cost of revenues:
Total cost of revenues	[1]	503,678	408,928	303,369
Gross profit		1,347,099	1,056,141	800,712
Operating expenses:
Research and development	[1]	382,035	294,220	209,895
Sales and marketing	[1]	288,061	235,014	190,331
General and administrative	[1]	171,507	149,113	114,267
Total operating expenses	[1]	841,603	678,347	514,493
Operating income		505,496	377,794	286,219
Other income, net		6,815	16,199	27,478
Income before income taxes		512,311	393,993	313,697
Provision for income taxes		84,921	13,995	12,579
Net income		$ 427,390	$ 379,998	$ 301,118
Net income per share:
Basic (in usd per share)		$ 2.79	$ 2.52	$ 2.04
Diluted (in usd per share)		$ 2.63	$ 2.36	$ 1.90
Weighted-average shares used to compute net income per share:
Basic (in shares)		153,251	150,666	147,796
Diluted (in shares)		162,277	160,732	158,296
Other comprehensive income:
Net change in unrealized (loss) gain on available-for-sale investments, net of tax		$ (9,872)	$ 985	$ 2,388
Net change in cumulative foreign currency translation loss		(3,078)	(453)	(2,857)
Comprehensive income		414,440	380,530	300,649
Subscription services
Revenues:
Total revenues		1,483,976	1,179,486	896,294
Cost of revenues:
Total cost of revenues	[1]	224,911	184,589	136,328
Professional services and other
Revenues:
Total revenues		366,801	285,583	207,787
Cost of revenues:
Total cost of revenues	[1]	$ 278,767	$ 224,339	$ 167,041

[1] (1) Includes stock-based compensation as follows: Cost of revenues:Cost of subscription services$4,795 $4,840 $2,638 Cost of professional services and other36,293 27,698 17,518 Research and development83,837 63,541 37,001 Sales and marketing56,830 40,574 27,537 General and administrative52,881 48,348 31,212 Total stock-based compensation$234,636 $185,001 $115,906