Equity - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2025 USD ($) distribution shares	Oct. 31, 2024 USD ($) shares	Oct. 31, 2025 USD ($) distribution shares	Oct. 31, 2024 USD ($) shares	Mar. 31, 2025 shares	Mar. 31, 2024 shares	Sep. 30, 2021 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense (gain)	$ 51,682	$ 48,042	$ 161,793	$ 139,263
Compensation expense not yet recognized	8,200		8,200
Tax benefit for stock-based compensation expense	$ 0	0	$ 0	0
Number of distributions, donation | distribution	4		4
Charitable donation of common stock	$ 1,970	2,957	$ 5,496	8,871
Shares subject to outstanding common stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense (gain)	3,900	3,100	$ 13,200	10,000
Period for recognition (in years)			6 months
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense (gain)	44,400	$ 40,300	$ 136,400	$ 117,100
Period for recognition (in years)			2 years 9 months 18 days
Compensation expense not yet recognized	$ 399,200		$ 399,200
Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (in shares) | shares							1,635,545
Aggregate principal amount, donation | shares					163,555	221,195
Charitable donation of common stock (in shares) | shares	40,889	52,940	122,667	173,181
Charitable donation of common stock	$ 2,000	$ 3,000	$ 5,500	$ 8,900
2021 Equity Incentive Plan | RSUs | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)			2 years
2021 Equity Incentive Plan | RSUs | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)			4 years
2025 Plan | PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs granted in period (in shares) | shares			300,000
2025 Plan | PSUs | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting percentage			0.00%
2025 Plan | PSUs | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting percentage			200.00%
2022 Plan | PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense (gain)	(200)	900	$ 1,100	1,800
Period for recognition (in years)			2 years 6 months
Compensation expense not yet recognized	3,800		$ 3,800
2021 Employee Stock Purchase Plan | Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense (gain)	3,000	$ 2,500	$ 9,700	$ 8,600
Period for recognition (in years)			1 year 7 months 6 days
Compensation expense not yet recognized	$ 16,500		$ 16,500