Debt and Preferred Equity Investments - Schedule of Debt Investments with an Aggregate Weighted Average Current Yield (Details) - USD ($)	1 Months Ended	9 Months Ended	21 Months Ended
	Jul. 31, 2023	Sep. 30, 2024	Sep. 30, 2024	Dec. 31, 2023	Dec. 31, 2022
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate, interest rate		6.32%
Debt Investments Held [Abstract]
Carrying Value, Fixed Rate		$ 293,924,000	$ 293,924,000	$ 346,745,000
Carrying Value		293,924,000	293,924,000	346,745,000
Allowance for loan loss		(13,520,000)	(13,520,000)	(13,520,000)	$ (6,630,000)
Mezzanine Loan Due June 2024
Debt Investments Held [Abstract]
Amount participated out		12,000,000.0	12,000,000.0
Loan interest income	$ 0
Debt Investments in Mortgage Loans
Debt Investments Held [Abstract]
Future Funding Obligations		8,099,000	8,099,000
Senior Financing		804,021,000	804,021,000
Carrying Value		159,450,000	159,450,000	218,745,000
Allowance for loan loss		(13,520,000)	(13,520,000)	(13,520,000)
Total fixed rate
Debt Investments Held [Abstract]
Future Funding Obligations		0	0
Senior Financing		285,000,000	285,000,000
Carrying Value, Fixed Rate		63,366,000	63,366,000	63,366,000
Total fixed rate | Mezzanine Loan Due June 2024
Debt Investments Held [Abstract]
Future Funding Obligations		0	0
Senior Financing		105,000,000	105,000,000
Carrying Value, Fixed Rate		13,366,000	13,366,000	13,366,000
Total fixed rate | Mezzanine Loan, with an Initial Maturity Date of January 2025
Debt Investments Held [Abstract]
Future Funding Obligations		0	0
Senior Financing		95,000,000	95,000,000
Carrying Value, Fixed Rate		30,000,000	30,000,000	30,000,000
Total fixed rate | Mezzanine Loan With Initial Maturity Date of December 2029
Debt Investments Held [Abstract]
Future Funding Obligations		0	0
Senior Financing		85,000,000	85,000,000
Carrying Value, Fixed Rate		20,000,000	20,000,000	20,000,000
Total floating rate
Debt Investments Held [Abstract]
Future Funding Obligations		8,099,000	8,099,000
Senior Financing		519,021,000	519,021,000
Carrying Value		109,604,000	109,604,000	168,899,000
Total floating rate | Mezzanine Loan Due April 2023
Debt Investments Held [Abstract]
Future Funding Obligations		0	0
Senior Financing		275,000,000	275,000,000
Carrying Value		50,000,000	50,000,000	50,000,000
Loan interest income			0
Total floating rate | Mezzanine Loan Due May 2024
Debt Investments Held [Abstract]
Future Funding Obligations		0	0
Senior Financing		54,000,000	54,000,000
Carrying Value		8,620,000	8,620,000	8,243,000
Total floating rate | Mezzanine Loan Due May 2024 One
Debt Investments Held [Abstract]
Future Funding Obligations		8,099,000	8,099,000
Senior Financing		190,021,000	190,021,000
Carrying Value		50,984,000	50,984,000	48,323,000
Total floating rate | Mezzanine Loan Due January 2026
Debt Investments Held [Abstract]
Future Funding Obligations		0	0
Senior Financing		0	0
Carrying Value		$ 0	$ 0	$ 62,333,000