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Equity Compensation Plans - Additional Information (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2019 | Jun. 30, 2023 | Sep. 30, 2023 | Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Unrecognized compensation cost |  |  | $ 30,020 | $ 40,188
Weighted average amortization period remaining for equity awards |  |  | 2 years |
Performance-based valuation adjustment |  |  | $ 3,205 |
Shares of common stock to be purchased in aggregate for all employees (in shares) |  |  | 850,000 |
Number of shares purchased by employees (in shares) |  |  | 739,404 | 657,777
Restricted Stock Units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Unvested outstanding stock awards (in shares) |  |  | 585,284 | 806,119
Number of stock awards granted (in shares) |  |  | 263,590 |
Number of stock awards vested (in shares) |  |  | 354,813 |
Number of stock awards forfeited (in shares) |  |  | 129,612 |
Deferred Stock Units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Unvested outstanding stock awards (in shares) |  |  | 4,896,376,000 | 4,831,338
Number of stock awards granted (in shares) |  |  | 936,206 |
Number of stock awards vested (in shares) |  |  | 2,700,517,000 | 2,495,787
Number of stock awards forfeited (in shares) |  |  | 50,122 |
Stock units distributed (in shares) |  |  | 821,046 |
Performance Stock Units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Unvested outstanding stock awards (in shares) |  |  | 2,078,171 | 2,354,002
Number of stock awards granted (in shares) | 275,831 |  |  |
Share-based compensation, vesting period (in years) |  |  | 3 years |
Redwood Incentive Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Additional common stock grant (in shares) |  | 9,650,000 |  |
Common stock available for grant (in shares) |  |  | 12,268,074 | 2,896,604
Redwood Incentive Plan | Restricted Stock Units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Unrecognized compensation cost |  |  | $ 3,661 | $ 5,068
Performance-based valuation adjustment |  |  | 0 |
Redwood Incentive Plan | Deferred Stock Units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Unrecognized compensation cost |  |  | 17,084 | 19,849
Performance-based valuation adjustment |  |  | 0 |
Redwood Incentive Plan | Performance Stock Units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Unrecognized compensation cost |  |  | 9,171 | $ 15,271
Performance-based valuation adjustment |  |  | $ 3,205 |

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