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Equity Investments in Ground Leases (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 31, 2024 | Dec. 31, 2021 | Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024 | Jul. 31, 2024 | Jun. 30, 2022 | Feb. 28, 2022 | Nov. 30, 2021 | Jun. 30, 2021
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying value | [1] |  |  | $ 261,107 |  | $ 261,107 |  | $ 250,034 |  |  |  |  |
Earnings (losses) from equity method investments |  |  |  | 4,912 | $ 6,469 | 9,904 | $ 13,381 |  |  |  |  |  |
Ground Lease acquisition purchase price |  |  |  |  |  | 54,948 | 110,206 |  |  |  |  |  |
Land and Related Ground Lease |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Leasehold improvement allowance, funded amount |  |  |  | 51,800 |  | 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 |
iStar Inc. | Ground Lease Plus Fund |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) from sale of Ground Lease |  |  | $ 0 |  |  |  |  |  |  |  |  |  |
425 Park Avenue | Equity Method Venture |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying value |  |  |  | 138,629 |  | 138,629 |  | 137,348 |  |  |  |  |
Earnings (losses) from equity method investments |  |  |  | $ 887 | 856 | $ 1,772 | 1,735 |  |  |  |  |  |
Ownership percentage |  |  |  | 54.80% |  | 54.80% |  |  |  |  |  |  |
32 Old Slip |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying value |  |  |  | $ 65,858 |  | $ 65,858 |  | 57,574 |  |  |  |  |
Earnings (losses) from equity method investments |  |  |  | 1,323 | 1,417 | 2,754 | 2,842 |  |  |  |  |  |
Ownership percentage |  |  |  |  |  |  |  |  |  |  |  |  | 29.20%
Ground Lease Plus Fund |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying value |  |  |  | 30,340 |  | 30,340 |  | 30,103 |  |  |  |  |
Earnings (losses) from equity method investments |  |  |  | 330 | 453 | 814 | 1,342 |  |  |  |  |  |
Basis difference in equity investment to be amortized |  |  |  | 19,600 |  | 19,600 |  |  |  |  |  |  |
Amortization of basis difference in equity investments |  |  |  | $ (100) | (100) | $ (200) | 100 |  |  |  |  |  |
Weighted average remaining term |  |  |  |  |  | 105 years 1 month 6 days |  |  |  |  |  |  |
Ownership percentage |  |  |  | 53.20% |  | 53.20% |  |  |  |  |  |  |
Leasehold Loan Fund |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying value |  |  |  | $ 26,280 |  | $ 26,280 |  | $ 25,009 |  |  |  |  |
Earnings (losses) from equity method investments |  |  |  | 2,372 | 3,743 | 4,564 | 7,462 |  |  |  |  |  |
Basis difference in equity investment to be amortized |  |  |  | 5,100 |  | 5,100 |  |  |  |  |  |  |
Amortization of basis difference in equity investments |  |  |  | $ 700 | $ 2,200 | $ 1,400 | $ 3,200 |  |  |  |  |  |
Weighted average remaining term |  |  |  |  |  | 1 year 9 months 18 days |  |  |  |  |  |  |
Ownership percentage |  |  |  | 53.20% |  | 53.20% |  |  |  |  |  |  |
Leasehold Loan Fund | Life science property |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Commitment to provide loan to Ground lessee |  |  |  |  |  |  |  |  |  |  | $ 130,000 |  |
Leasehold improvement allowance, funded amount |  |  |  | $ 11,000 |  | $ 11,000 |  |  |  |  |  |  |
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 |  |  |  | 43,700 |  | 43,700 |  |  |  |  |  |  |
Leasehold Loan Fund | Student housing project |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Commitment to provide loan to Ground lessee |  |  |  |  |  |  |  |  | $ 31,500 |  |  |  |
Leasehold improvement allowance, funded amount |  |  |  | $ 4,900 |  | $ 4,900 |  |  |  |  |  |  |
[1] | Refer to Note 2 for details on the Company’s consolidated variable interest entities (“VIEs”).

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