CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Revenues:
Total revenues	$ 455,594	$ 353,683	$ 889,167	$ 690,789
Cost of revenues:
Total cost of revenues	122,097	97,204	238,233	192,084
Gross profit	333,497	256,479	650,934	498,705
Operating expenses:
Research and development	94,899	70,053	178,125	132,290
Sales and marketing	71,789	59,172	136,399	114,927
General and administrative	42,185	37,173	83,340	73,842
Total operating expenses	208,873	166,398	397,864	321,059
Operating income	124,624	90,081	253,070	177,646
Other income, net	1,666	2,881	6,230	6,295
Income before income taxes	126,290	92,962	259,300	183,941
Provision for (benefit from) income taxes	17,432	(589)	34,875	3,820
Net income	$ 108,858	$ 93,551	$ 224,425	$ 180,121
Net income per share:
Basic (in usd per share)	$ 0.71	$ 0.62	$ 1.47	$ 1.20
Diluted (in usd per share)	$ 0.67	$ 0.58	$ 1.38	$ 1.12
Weighted-average shares used to compute net income per share:
Basic (in shares)	153,090	150,413	152,768	149,982
Diluted (in shares)	162,765	160,840	162,636	160,309
Other comprehensive income:
Net change in unrealized gain (loss) on available-for-sale investments	$ (217)	$ 1,131	$ (1,303)	$ 2,428
Net change in cumulative foreign currency translation gain (loss)	(165)	2,893	(2,378)	3,282
Comprehensive income	108,476	97,575	220,744	185,831
Subscription services
Revenues:
Total revenues	366,436	283,502	707,555	553,737
Cost of revenues:
Total cost of revenues	53,909	43,400	105,126	86,612
Professional services and other
Revenues:
Total revenues	89,158	70,181	181,612	137,052
Cost of revenues:
Total cost of revenues	$ 68,188	$ 53,804	$ 133,107	$ 105,472