Debt and Preferred Equity Investments - Schedule of Debt and Preferred Equity Investments (Details) $ in Thousands	Sep. 30, 2024 USD ($) investment	Dec. 31, 2023 USD ($) investment
Debt Instrument [Line Items]
Carrying Value	$ 293,924	$ 346,745
Senior Financing	$ 1,054,021
Number of investments, nonperforming | investment	2	2
Total floating rate
Debt Instrument [Line Items]
Carrying Value	$ 109,450
Face Value	109,604
Total fixed rate
Debt Instrument [Line Items]
Carrying Value	184,474
Face Value	184,474
Mezzanine Debt
Debt Instrument [Line Items]
Carrying Value	159,450
Senior Financing	804,021
Mezzanine Debt | Total floating rate
Debt Instrument [Line Items]
Carrying Value	109,450
Face Value	109,604
Mezzanine Debt | Total fixed rate
Debt Instrument [Line Items]
Carrying Value	50,000
Face Value	50,000
Preferred Equity (4)
Debt Instrument [Line Items]
Carrying Value	134,474
Senior Financing	250,000
Preferred Equity (4) | 625 Madison Avenue
Debt Instrument [Line Items]
Carrying Value	209,900
Preferred Equity (4) | Total floating rate
Debt Instrument [Line Items]
Carrying Value	0
Face Value	$ 0
Basis spread on variable rate	0.00%
Preferred Equity (4) | Total fixed rate
Debt Instrument [Line Items]
Carrying Value	$ 134,474
Face Value	$ 134,474
Interest Rate	6.50%
Minimum | Mezzanine Debt | Total floating rate
Debt Instrument [Line Items]
Basis spread on variable rate	5.00%
Minimum | Mezzanine Debt | Total fixed rate
Debt Instrument [Line Items]
Interest Rate	8.00%
Maximum | Mezzanine Debt | Total floating rate
Debt Instrument [Line Items]
Basis spread on variable rate	12.11%
Maximum | Mezzanine Debt | Total fixed rate
Debt Instrument [Line Items]
Interest Rate	8.40%