Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 30, 2021	Apr. 30, 2020
Revenues:
Total revenues	$ 433,573	$ 337,106
Cost of revenues:
Total cost of revenues	116,136	94,880
Gross profit	317,437	242,226
Operating expenses:
Research and development	83,226	62,237
Sales and marketing	64,610	55,755
General and administrative	41,155	36,669
Total operating expenses	188,991	154,661
Operating income	128,446	87,565
Other income, net	4,564	3,414
Income before income taxes	133,010	90,979
Provision for income taxes	17,443	4,409
Net income	$ 115,567	$ 86,570
Net income per share:
Basic (in usd per share)	$ 0.76	$ 0.58
Diluted (in usd per share)	$ 0.71	$ 0.54
Weighted-average shares used to compute net income per share:
Basic (in shares)	152,444	149,541
Diluted (in shares)	162,213	159,474
Other comprehensive income:
Net change in unrealized gain (loss) on available-for-sale investments	$ (1,086)	$ 1,297
Net change in cumulative foreign currency translation gain (loss)	(2,213)	389
Comprehensive income	112,268	88,256
Subscription services
Revenues:
Total revenues	341,119	270,235
Cost of revenues:
Total cost of revenues	51,217	43,212
Professional services and other
Revenues:
Total revenues	92,454	66,871
Cost of revenues:
Total cost of revenues	$ 64,919	$ 51,668