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Business and Organization - Merger Transactions (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2023 | Mar. 31, 2028 | Mar. 31, 2027 | Mar. 31, 2026 | Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2022
Safehold Inc. |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Voting interest of shareholder agreement |  |  |  |  |  |  | 41.90%
MSD Partners, | Forecast |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Number of shares to be sold under purchase commitment related to merger | 5,405,406 |  |  |  |  |  |
Expected proceeds from sale of shares under purchase commitment related to merger | $ 200.0 |  |  |  |  |  |
MSD Partners, | Caret Units | Forecast |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Number of shares to be sold under purchase commitment related to merger | 100,000 |  |  |  |  |  |
Expected proceeds from sale of shares under purchase commitment related to merger | $ 20.0 |  |  |  |  |  |
SpinCo | Forecast |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Stated interest rate | 8.00% |  |  |  |  |  |
Debt instrument term | 4 years |  |  |  |  |  |
Debt instrument, face amount | $ 100.0 |  |  |  |  |  |
Maximum borrowing capacity of proposed bank debt | 140.0 |  |  |  |  |  |
Value of SAFE common stock to be pledged as security on bank debt | $ 400.0 |  |  |  |  |  |
SpinCo | Safehold Inc. | Forecast |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Annual management fees |  |  | $ 5.0 | $ 10.0 | $ 15.0 | $ 25.0 |
Annual management Fee, Percent, Year Five and Thereafter |  | 2.00% |  |  |  |  |

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