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Stockholders' Equity and Non-Controlling Interests - Narrative (Details) |  |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Nov. 06, 2021 USD ($) | Nov. 05, 2021 USD ($) | Apr. 30, 2022 USD ($) shares | Dec. 31, 2025 USD ($) extension $ / shares shares | Dec. 31, 2024 USD ($) $ / shares shares | Dec. 31, 2023 USD ($) $ / shares shares | May 31, 2025 USD ($) | May 31, 2014 shares
Equity Incentive Plans |  |  |  |  |  |  |  |
Preferred stock, shares authorized (in shares) | shares |  |  |  | 100,000,000 | 100,000,000 |  |  |
Preferred stock, par value (in dollars per share) | $ / shares |  |  |  | $ 0.01 | $ 0.01 |  |  |
Common stock, shares authorized (in shares) | shares |  |  |  | 500,000,000 | 500,000,000 |  |  |
Common stock, par value (in dollars per share) | $ / shares |  |  |  | $ 0.01 | $ 0.01 |  |  |
Shares authorized under DRIP plan (in shares) | shares |  |  |  |  |  |  |  | 11,000,000.0
Granted (in shares) | shares |  |  |  | 3,753,212 |  |  |  |
Granted (in dollars per share) | $ / shares |  |  |  | $ 20.01 | $ 20.23 | $ 18.93 |  |
Unrecognized compensation expense |  |  |  | $ 78,700,000 |  |  |  |
Compensation recognition period |  |  |  | 1 year 6 months |  |  |  |
Fair value of shares vested in period |  |  |  | $ 41,500,000 | $ 51,800,000 | $ 30,300,000 |  |
Contributions from non-controlling interests |  |  |  | 7,450,000 | 9,306,000 | 2,724,000 |  |
Net income |  |  |  | 6,929,000 | 19,549,000 | 58,410,000 |  |
Net income attributable to non-controlling interests |  |  |  | $ 31,549,000 | 20,644,000 | 78,944,000 |  |
CMBS JV |  |  |  |  |  |  |  |
Equity Incentive Plans |  |  |  |  |  |  |  |
Subsidiary, ownership percentage, parent |  |  |  | 51.00% |  |  |  |
Class A Units |  |  |  |  |  |  |  |
Equity Incentive Plans |  |  |  |  |  |  |  |
Value of shares issued to settle redemption |  |  |  | $ 100,000 | 0 | 100,000 |  |
Cash amount settled |  |  |  |  |  | 1,300,000 |  |
Number of units outstanding (in shares) | shares |  |  |  | 9,600,000 |  |  |  |
Woodstar II Portfolio | Class A Units |  |  |  |  |  |  |  |
Equity Incentive Plans |  |  |  |  |  |  |  |
Net income attributable to non-controlling interests |  |  |  | $ 18,500,000 | 18,600,000 | 18,700,000 |  |
Subsidiaries | Woodstar II Portfolio |  |  |  |  |  |  |  |
Equity Incentive Plans |  |  |  |  |  |  |  |
Conversion of stock ratio |  |  |  | 1 |  |  |  |
Subsidiaries | Woodstar II Portfolio | Class A Units |  |  |  |  |  |  |  |
Equity Incentive Plans |  |  |  |  |  |  |  |
Shares issued (in shares) | shares |  |  |  | 10,200,000 |  |  |  |
Right to receive additional shares (in shares) | shares |  |  |  | 1,900,000 |  |  |  |
Subsidiaries | Woodstar II Portfolio | Class A Units | Non- Controlling Interests |  |  |  |  |  |  |  |
Equity Incentive Plans |  |  |  |  |  |  |  |
Redemption of units |  |  |  | $ 205,700,000 | 207,100,000 |  |  |
Woodstar Fund |  |  |  |  |  |  |  |
Equity Incentive Plans |  |  |  |  |  |  |  |
Percentage of interest sold |  | 20.60% |  |  |  |  |  |
Contributions from non-controlling interests | $ 214,200,000 | $ 216,000,000.0 |  |  |  |  |  |
Initial term |  |  |  | 8 years |  |  |  |
Number of extension options | extension |  |  |  | 2 |  |  |  |
Extension term |  |  |  | 1 year |  |  |  |
CMBS JV |  |  |  |  |  |  |  |
Equity Incentive Plans |  |  |  |  |  |  |  |
Non-controlling interest |  |  |  | $ 89,300,000 | 94,500,000 |  |  |
CMBS JV | Joint Venture Partner |  |  |  |  |  |  |  |
Equity Incentive Plans |  |  |  |  |  |  |  |
Ownership percentage |  |  |  | 49.00% |  |  |  |
CMBS JV | Woodstar II Portfolio | Class A Units |  |  |  |  |  |  |  |
Equity Incentive Plans |  |  |  |  |  |  |  |
Net income attributable to non-controlling interests |  |  |  | $ 2,600,000 | $ (23,000,000.0) | $ (1,500,000) |  |
Starwood Property Trust, Inc. Equity Plan and Manager Equity Plan |  |  |  |  |  |  |  |
Equity Incentive Plans |  |  |  |  |  |  |  |
Number of shares of authorized for issuance (in shares) | shares |  |  | 18,700,000 |  |  |  |  |
Number of shares available for future grants (in shares) | shares |  |  |  | 9,731,228 |  |  |  |
Vesting Period |  |  |  | 3 years |  |  |  |
Employee Stock |  |  |  |  |  |  |  |
Equity Incentive Plans |  |  |  |  |  |  |  |
Purchase price of fair market value |  |  | 85.00% |  |  |  |  |
Maximum purchase value during calendar year, per employee |  |  | $ 25,000 |  |  |  |  |
Number of shares of authorized for issuance (in shares) | shares |  |  | 2,000,000 |  |  |  |  |
Number of shares issued for future grants (in shares) | shares |  |  |  | 115,117 | 113,953 | 123,327 |  |
Purchase price (in dollars per share) | $ / shares |  |  |  | $ 16.77 | $ 16.88 | $ 15.46 |  |
Common stock available for future issuance (in shares) | shares |  |  |  | 1,600,000 |  |  |  |
Restricted stock | Starwood Property Trust, Inc. Equity Plan and Manager Equity Plan |  |  |  |  |  |  |  |
Equity Incentive Plans |  |  |  |  |  |  |  |
Granted (in shares) | shares |  |  |  | 2,403,212 | 1,833,660 | 914,694 |  |
ATM Agreement |  |  |  |  |  |  |  |
Equity Incentive Plans |  |  |  |  |  |  |  |
Authorized value of stock under ATM agreement |  |  |  |  |  |  | $ 500,000,000.0 |
Number of shares issued (in shares) | shares |  |  |  | 1,561,634 | 0 | 0 |  |
Sale of Stock, Consideration Received on Transaction |  |  |  | $ 31,600,000 |  |  |  |
Sale of stock average price (in dollars per share) | $ / shares |  |  |  | $ 20.22 |  |  |  |
Commission costs under ATM agreement |  |  |  | $ 500,000 |  |  |  |

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