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Equity Investments in Ground Leases (Details) $ in Thousands		1 Months Ended				12 Months Ended
		Jan. 31, 2024 USD ($)	Jan. 31, 2022 USD ($) lease	Dec. 31, 2021 USD ($)	Jun. 30, 2021 agreement	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Jul. 31, 2024 USD ($)	Apr. 30, 2024 USD ($)	Jun. 30, 2022 USD ($)	Feb. 28, 2022 USD ($)	Nov. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)
Schedule of Equity Method Investments [Line Items]
Carrying value	[1]					$ 250,034	$ 310,320
Earnings (losses) from equity method investments						22,977	24,229	$ 9,055
Ground Lease acquisition purchase price						183,630
Land and Related Ground Lease
Schedule of Equity Method Investments [Line Items]
Leasehold improvement allowance, funded amount						51,800
Ground Lease Plus Fund
Schedule of Equity Method Investments [Line Items]
Ground Lease acquisition purchase price		$ 38,300
iStar Inc.
Schedule of Equity Method Investments [Line Items]
Value of land acquired													$ 33,300
Gain (loss) from sale of Ground Lease				$ 0
Number of agreements entered into to acquire land and related Ground Lease | agreement					2
iStar Inc. | Multi-family project
Schedule of Equity Method Investments [Line Items]
Commitment to provide loan to Ground lessee														$ 75,000
iStar Inc. | Ground Lease Plus Fund
Schedule of Equity Method Investments [Line Items]
Gain (loss) from sale of Ground Lease			$ 500
Number of Ground Leases sold | lease			2
425 Park Avenue
Schedule of Equity Method Investments [Line Items]
Carrying value						137,348	135,288
Earnings (losses) from equity method investments						$ 3,245	3,536	3,403
Ownership percentage						54.80%
32 Old Slip
Schedule of Equity Method Investments [Line Items]
Carrying value						$ 57,574	52,425
Earnings (losses) from equity method investments						5,662	5,670	$ 5,652
Ownership percentage					29.20%
Ground Lease Plus Fund
Schedule of Equity Method Investments [Line Items]
Carrying value						30,103	73,428
Earnings (losses) from equity method investments						2,271	5,415
Basis difference in equity investment to be amortized						19,400
Amortization of basis difference in equity investments						$ (100)	2,400
Weighted average remaining term						105 years 7 months 6 days
Ownership percentage						53.20%
Leasehold Loan Fund
Schedule of Equity Method Investments [Line Items]
Carrying value						$ 25,009	49,179
Earnings (losses) from equity method investments						11,799	9,608
Basis difference in equity investment to be amortized						6,500
Amortization of basis difference in equity investments						$ 4,800	$ 3,000
Weighted average remaining term						2 years 3 months 18 days
Leasehold Loan Fund | Life science property
Schedule of Equity Method Investments [Line Items]
Commitment to provide loan to Ground lessee												$ 130,000
Loan commitment to Ground lessee that has been funded						$ 800
Leasehold Loan Fund | Mixed-use property
Schedule of Equity Method Investments [Line Items]
Commitment to provide loan to Ground lessee											$ 105,000
Loan commitment to Ground lessee that has been funded						$ 40,800
Leasehold Loan Fund | Multi-family project
Schedule of Equity Method Investments [Line Items]
Loan commitment to Ground lessee that has been funded										$ 69,400
Leasehold Loan Fund | Student housing project
Schedule of Equity Method Investments [Line Items]
Commitment to provide loan to Ground lessee									$ 31,500
[1] Refer to Note 2 for details on the Company’s consolidated variable interest entities ("VIEs").

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