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Debt Obligations, net (Secured Term Loan and Credit Facility Narrative) (Details) $ in Millions |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 15 Months Ended
--- | --- | --- | --- | --- | --- | ---
Mar. 31, 2023 USD ($) | Dec. 31, 2023 USD ($) item | Jun. 30, 2024 USD ($) | Jun. 30, 2023 USD ($) | Mar. 31, 2023 USD ($) | Jun. 30, 2024 USD ($) | Jun. 30, 2023 USD ($) | Dec. 31, 2023 USD ($) | Jun. 30, 2024 USD ($)
Safehold Inc. | Interest expense - related party |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |
Interest expense |  |  | $ 2.4 | $ 2.4 |  | $ 4.7 | $ 2.4 |  |
Loan Payable to iStar |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, face amount | $ 125.0 |  |  |  | $ 125.0 |  |  |  |
Stated interest rate | 8.00% |  |  |  | 8.00% |  |  |  |
Interest expense |  |  |  |  | $ 2.5 |  |  |  |
Senior Construction Mortgage Loan | Venture |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | $ 80.0 |  |  |  |  |  | $ 80.0 |
Debt instrument term extension, number of option | item |  | 1 |  |  |  |  |  |  |
Debt instrument extension term |  | 12 months |  |  |  |  |  |  |
Debt instrument term extension option fees |  | 1.00% |  |  |  |  |  |  |
Debt instrument origination fees |  | 1.00% |  |  |  |  |  |  |
Debt instrument exit fees |  | 1.85% |  |  |  |  |  |  |
Debt instrument term |  | 3 years |  |  |  |  |  |  |
Senior Construction Mortgage Loan | SOFR | Venture |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument floor rate |  | 3.65% |  |  |  |  |  |  |
Basis point spread on variable interest rate |  | 6.85% |  |  |  |  |  |  |
Secured Debt | Safe Credit Facility |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |
Stated interest rate |  | 8.00% | 8.00% |  |  | 8.00% |  | 8.00% | 8.00%
Secured Debt | Safe Credit Facility | Safehold Inc. |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |
Stated interest rate | 8.00% |  |  |  | 8.00% |  |  |  |
Interest rate when any loan remains outstanding under an incremental facility available under the Safe Credit Facility | 10.00% |  |  |  | 10.00% |  |  |  |
Commitment fees paid | $ 0.6 |  |  |  |  |  |  |  |
Secured Debt | Term Loan | Safehold Inc. |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, face amount | 115.0 |  |  |  | $ 115.0 |  |  |  |
Secured Debt | Incremental Borrowing Facility | Safehold Inc. |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |
Maximum borrowing capacity | 25.0 |  |  |  | 25.0 |  |  |  |
Secured Debt | Margin Loan Facility | SOFR |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |
Basis point spread on variable interest rate |  |  |  |  |  | 3.00% |  | 3.00% |
Secured Debt | Margin Loan Facility | Morgan Stanley |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, face amount | $ 140.0 |  |  |  | $ 140.0 |  |  |  |
Debt instrument term | 3 years |  |  |  |  |  |  |  |
Loan proceeds used to extinguish senior unsecured notes | $ 88.0 |  |  |  |  |  |  |  |
Repayment of principal |  |  |  |  |  |  |  |  | $ 60.0

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