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Stock-Based Compensation - Additional Information (Details) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 31, 2022 USD ($) Plan shares | Jul. 31, 2021 USD ($) | Jul. 31, 2022 USD ($) Plan shares | Jul. 31, 2021 USD ($)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Number of employee equity plans | Plan | 2 |  | 2 |
Share-based compensation expense | $ 48,686 | $ 44,128 | $ 95,796 | $ 85,918
Restricted Stock Units |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Remaining weighted-average period |  |  | 2 years 11 months 8 days |
Unrecognized stock-based compensation expense | $ 394,100 |  | $ 394,100 |
2015 Equity Incentive Plan | Class A Common Stock |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Shares common stock reserved for issuance | shares | 23,057,400 |  | 23,057,400 |
2015 Employee Stock Purchase Plan |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Unrecognized stock-based compensation expense | $ 13,200 |  | $ 13,200 |
2015 Employee Stock Purchase Plan | Class A Common Stock |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Shares common stock reserved for issuance | shares | 5,795,134 |  | 5,795,134 |
Fiscal 2022 Executive Bonus Plan |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Share-based compensation expense |  |  | $ 4,500 |
Fiscal 2023 Executive Bonus Plan |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Unrecognized stock-based compensation expense | $ 9,100 |  | 9,100 |
Share-based compensation expense |  |  | $ 6,000 |

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