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v3.22.1

Stock-Based Compensation - Non-Plan Founder and Blend Options (Details) - USD ($) $ / shares in Units, $ in Thousands | 1 Months Ended | 2 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Mar. 31, 2021 | Aug. 24, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Jul. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Stock based compensation expense |  |  | $ 70,844 | $ 10,124 | $ 9,889 |
Unrecognized compensation expense |  |  | $ 75,000 |  |  |
Non-employee | Class B Common Stock |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Granted (in shares) | 26,057,181 |  |  |  |  |
Granted (in dollars per share) | $ 8.58 |  |  |  |  |
Non-employee | Class B Common Stock | Tranche One |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Expected to vest (in shares) |  |  |  |  |  | 1,954,289
Stock Options |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Unrecognized compensation expense, period of recognition |  |  | 2 years 10 months 24 days |  |  |
Stock Options | Non-employee |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Unrecognized compensation expense |  |  | $ 46,000 |  |  |
Unrecognized compensation expense, period of recognition |  |  | 3 years 4 months 24 days |  |  |
Stock Options | Non-employee | Tranche One |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Stock based compensation expense |  | $ 24,000 |  |  |  |
Stock Options | Non-employee | Tranche Two |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Stock based compensation expense |  | $ 5,700 | $ 38,800 |  |  |
Stock Options | Non-employee | Class B Common Stock |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Vesting period | 15 years |  |  |  |  |
Performance period | 15 months |  |  |  |  |

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