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Equity Investments (Details) $ in Thousands		1 Months Ended			3 Months Ended		6 Months Ended
		Jan. 31, 2022 USD ($) lease	Dec. 31, 2021 USD ($)	Jun. 30, 2021 agreement	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)	Feb. 28, 2022 USD ($)	Nov. 30, 2021 USD ($)
Schedule of Equity Method Investments [Line Items]
Carrying value	[1]				$ 267,206		$ 267,206		$ 180,388
Earnings from equity method investments					$ 6,807	$ 2,252	$ 9,069	$ 4,528
iStar Inc.
Schedule of Equity Method Investments [Line Items]
Value of land acquired											$ 33,300
Number of agreements entered into to acquire land and related Ground Lease | agreement				2
iStar Inc. | Ground Lease Plus Fund
Schedule of Equity Method Investments [Line Items]
Gain (loss) from sale of Ground Lease		$ 500	$ 0
Number of Ground Leases sold | lease		2
425 Park Avenue | Equity Method Venture
Schedule of Equity Method Investments [Line Items]
Ownership percentage					54.80%		54.80%
32 Old Slip
Schedule of Equity Method Investments [Line Items]
Ownership percentage				29.20%
Ground Lease Plus Fund
Schedule of Equity Method Investments [Line Items]
Basis difference in equity investment to be amortized					$ 21,000		$ 21,000
Amortization of basis difference in equity investments						$ 800		$ 800
Weighted average remaining term							96 years 8 months 12 days
Ownership percentage						53.00%		53.00%
Leasehold Loan Fund
Schedule of Equity Method Investments [Line Items]
Basis difference in equity investment to be amortized					13,800		$ 13,800
Amortization of basis difference in equity investments					$ 1,000		$ 1,000
Weighted average remaining term							3 years 6 months
Ownership percentage					53.00%		53.00%
Leasehold Loan Fund | Life science property
Schedule of Equity Method Investments [Line Items]
Commitment to provide loan to Ground lessee										$ 130,000
Leasehold Loan Fund | Mixed-use property
Schedule of Equity Method Investments [Line Items]
Commitment to provide loan to Ground lessee						$ 105,000		$ 105,000
Loan commitment to Ground lessee that has been funded						37,500		37,500
Real estate equity investments
Schedule of Equity Method Investments [Line Items]
Carrying value					$ 267,206		$ 267,206		180,388
Earnings from equity method investments					6,807	2,252	9,069	4,528
Real estate equity investments | 425 Park Avenue | Equity Method Venture
Schedule of Equity Method Investments [Line Items]
Carrying value					134,154		134,154		133,118
Earnings from equity method investments					872	827	1,708	1,677
Real estate equity investments | 32 Old Slip
Schedule of Equity Method Investments [Line Items]
Carrying value					49,850		49,850		$ 47,270
Earnings from equity method investments					1,420	$ 1,425	2,846	$ 2,851
Real estate equity investments | Ground Lease Plus Fund
Schedule of Equity Method Investments [Line Items]
Carrying value					54,123		54,123
Earnings from equity method investments					1,688		1,688
Real estate equity investments | Leasehold Loan Fund
Schedule of Equity Method Investments [Line Items]
Carrying value					29,079		29,079
Earnings from equity method investments					$ 2,827		$ 2,827
[1] Refer to Note 2 for details on the Company’s consolidated variable interest entities (“VIEs”).

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