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		6 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2022	Jul. 31, 2021
Numerator:
Net income	$ 45,750	$ 317,084	$ 159,408	$ 544,615
Net income attributable to common stockholders	$ 45,746	$ 316,930	$ 159,389	$ 544,306
Denominator:
Weighted-average shares used in computing net income per share attributable to common stockholders, basic (in shares)	298,553,379	295,712,675	298,865,676	294,769,619
Weighted-average shares used in computing net income per share attributable to common stockholders, diluted (in shares)	307,160,840	305,861,051	306,902,964	305,652,628
Net income per share attributable to common stockholders, basic (in dollars per share)	$ 0.15	$ 1.07	$ 0.53	$ 1.85
Net income per share attributable to common stockholders, diluted (in dollars per share)	$ 0.15	$ 1.04	$ 0.52	$ 1.78
Class A Common Stock
Numerator:
Net income	$ 38,594	$ 255,513	$ 134,075	$ 431,889
Less: undistributed earnings attributable to participating securities	0	0	0	0
Net income attributable to common stockholders	38,594	255,513	134,075	431,889
Reallocation of net income attributable to common stockholders	(518)	(5,738)	(1,959)	(10,105)
Net income attributable to common stockholders, diluted	$ 38,076	$ 249,775	$ 132,116	$ 421,784
Denominator:
Weighted-average shares used in computing net income per share attributable to common stockholders, basic (in shares)	251,878,556	238,407,148	251,400,283	233,889,833
Weighted-average shares used in computing net income per share attributable to common stockholders, diluted (in shares)	255,661,184	241,051,560	254,389,537	236,850,849
Net income per share attributable to common stockholders, basic (in dollars per share)	$ 0.15	$ 1.07	$ 0.53	$ 1.85
Net income per share attributable to common stockholders, diluted (in dollars per share)	$ 0.15	$ 1.04	$ 0.52	$ 1.78
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	8,313,041	570,634	6,160,652	435,755
Class A Common Stock | Outstanding stock options
Denominator:
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	103,406	0	51,703	0
Class B Common Stock
Numerator:
Net income	$ 7,156	$ 61,571	$ 25,333	$ 112,726
Less: undistributed earnings attributable to participating securities	(4)	(154)	(19)	(309)
Net income attributable to common stockholders	7,152	61,417	25,314	112,417
Reallocation of net income attributable to common stockholders	518	5,738	1,959	10,105
Net income attributable to common stockholders, diluted	$ 7,670	$ 67,155	$ 27,273	$ 122,522
Denominator:
Weighted-average shares used in computing net income per share attributable to common stockholders, basic (in shares)	46,674,823	57,305,527	47,465,393	60,879,786
Weighted-average shares used in computing net income per share attributable to common stockholders, diluted (in shares)	51,499,656	64,809,491	52,513,427	68,801,779
Net income per share attributable to common stockholders, basic (in dollars per share)	$ 0.15	$ 1.07	$ 0.53	$ 1.85
Net income per share attributable to common stockholders, diluted (in dollars per share)	$ 0.15	$ 1.04	$ 0.52	$ 1.78
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	0	0	0	0
Class B Common Stock | Outstanding stock options
Denominator:
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	0	0	0	0