Net Income Per Share Attributable to Common Stockholders - Schedule of Computation of Basic and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Numerator:
Net income	$ 113,658	$ 227,531
Net income attributable to common stockholders	$ 113,640	$ 227,383
Denominator:
Weighted-average shares used in computing net income per share attributable to common stockholders, basic (in shares)	299,147,105	293,794,778
Weighted-average shares used in computing net income per share attributable to common stockholders, diluted (in shares)	306,614,220	305,412,419
Net income per share attributable to common stockholders, basic (in dollars per share)	$ 0.38	$ 0.77
Net income per share attributable to common stockholders, diluted (in dollars per share)	$ 0.37	$ 0.74
Class A Common Stock
Numerator:
Net income	$ 95,289	$ 177,405
Less: undistributed earnings attributable to participating securities	0	0
Net income attributable to common stockholders	95,289	177,405
Reallocation of net income attributable to common stockholders	(1,498)	(4,308)
Net income (loss) attributable to common stockholders, diluted	$ 93,791	$ 173,097
Denominator:
Weighted-average shares used in computing net income per share attributable to common stockholders, basic (in shares)	250,840,017	229,220,253
Weighted-average shares used in computing net income per share attributable to common stockholders, diluted (in shares)	253,035,897	232,497,872
Net income per share attributable to common stockholders, basic (in dollars per share)	$ 0.38	$ 0.77
Net income per share attributable to common stockholders, diluted (in dollars per share)	$ 0.37	$ 0.74
Class B Common Stock
Numerator:
Net income	$ 18,369	$ 50,126
Less: undistributed earnings attributable to participating securities	(18)	(148)
Net income attributable to common stockholders	18,351	49,978
Reallocation of net income attributable to common stockholders	1,498	4,308
Net income (loss) attributable to common stockholders, diluted	$ 19,849	$ 54,286
Denominator:
Weighted-average shares used in computing net income per share attributable to common stockholders, basic (in shares)	48,307,088	64,574,525
Weighted-average shares used in computing net income per share attributable to common stockholders, diluted (in shares)	53,578,323	72,914,547
Net income per share attributable to common stockholders, basic (in dollars per share)	$ 0.38	$ 0.77
Net income per share attributable to common stockholders, diluted (in dollars per share)	$ 0.37	$ 0.74