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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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