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Equity Investments (Details) $ in Thousands		1 Months Ended			3 Months Ended
		Jan. 31, 2022 USD ($) lease	Dec. 31, 2021 USD ($)	Jun. 30, 2021 agreement	Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($)	Jun. 30, 2022 USD ($)	Feb. 28, 2022 USD ($)	Nov. 30, 2021 USD ($)
Schedule of Equity Method Investments [Line Items]
Carrying value	[1]				$ 243,490		$ 180,388
Earnings from equity method investments					$ 2,262	$ 2,276
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 | Joint Venture
Schedule of Equity Method Investments [Line Items]
Ownership percentage					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					$ 19,700
Weighted average remaining term					102 years 7 months 6 days
Ownership percentage						53.00%
Leasehold Loan Fund
Schedule of Equity Method Investments [Line Items]
Basis difference in equity investment to be amortized					$ 15,000
Weighted average remaining term					3 years 8 months 12 days
Ownership percentage					53.00%
Commitment to provide loan to ground lessee								$ 105,000	$ 130,000
Real estate equity investments
Schedule of Equity Method Investments [Line Items]
Carrying value					$ 243,490		180,388
Earnings from equity method investments					2,262	$ 2,276
Real estate equity investments | 425 Park Avenue
Schedule of Equity Method Investments [Line Items]
Carrying value					133,679		133,118
Earnings from equity method investments					835	851
Real estate equity investments | 32 Old Slip
Schedule of Equity Method Investments [Line Items]
Carrying value					48,564		$ 47,270
Earnings from equity method investments					1,427	$ 1,425
Real estate equity investments | Ground Lease Plus Fund
Schedule of Equity Method Investments [Line Items]
Carrying value					46,471
Real estate equity investments | Leasehold Loan Fund
Schedule of Equity Method Investments [Line Items]
Carrying value					$ 14,776
[1] Refer to Note 2 for details on the Company’s consolidated variable interest entities (“VIEs”).

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