Debt and Preferred Equity Investments - Debt Investment (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Aggregate weighted average current yield (as a percent)	6.65%
Debt Investments Held [Abstract]
Carrying Value	$ 1,107,870,000	$ 1,088,723,000
Carrying Value	1,107,870,000	1,088,723,000
Mezzanine Loan Due June 2024
Debt Investments Held [Abstract]
Amount participated out	12,000,000
Loan interest income	0
Mezzanine Loan Due March 2022
Debt Investments Held [Abstract]
Amount participated out	400,000
Debt Investments in Mortgage Loans
Debt Investments Held [Abstract]
Future Funding Obligations	60,212,000
Senior Financing	4,700,427,000
Allowance for loan loss	(6,630,000)	(6,630,000)
Carrying Value	825,927,000	815,717,000
Total fixed rate
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	2,937,108,000
Carrying Value	530,429,000	527,377,000
Total fixed rate | Mezzanine Loan Due August 2022
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	280,000,000
Carrying Value	44,182,000	43,521,000
Total fixed rate | Mortgage Loan Due April 2023
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	0
Carrying Value	73,000,000	73,000,000
Total fixed rate | Mezzanine Loan Due June 2023
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	382,473,000
Carrying Value	225,367,000	225,367,000
Total fixed rate | Mezzanine Loan Due June 2023, 2
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	276,885,000
Carrying Value	69,264,000	66,873,000
Total fixed rate | Mezzanine Loan Due June 2024
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	105,000,000
Carrying Value	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
Senior Financing	95,000,000
Carrying Value	30,000,000	30,000,000
Total fixed rate | Mezzanine Loan with an Initial Maturity Date of June 2027
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	1,712,750,000
Carrying Value	55,250,000	55,250,000
Total fixed rate | Mezzanine Loan With Initial Maturity Date of December 2029
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	85,000,000
Carrying Value	20,000,000	20,000,000
Total floating rate
Debt Investments Held [Abstract]
Future Funding Obligations	60,212,000
Senior Financing	1,763,319,000
Carrying Value	302,128,000	294,970,000
Total floating rate | Mezzanine Loan Due April 2022
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	275,000,000
Carrying Value	49,999,000	49,998,000
Total floating rate | Mezzanine Loan Due July 2022
Debt Investments Held [Abstract]
Future Funding Obligations	4,624,000
Senior Financing	181,536,000
Carrying Value	37,824,000	37,511,000
Total floating rate | Mezzanine Loan Due March 2022
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	1,115,000,000
Carrying Value	135,157,000	133,735,000
Total floating rate | Mortgage/Mezzanine Loan Due May 2022
Debt Investments Held [Abstract]
Future Funding Obligations	3,761,000
Senior Financing	54,000,000
Carrying Value	8,238,000	8,050,000
Total floating rate | Mezzanine Loan Due December 2022
Debt Investments Held [Abstract]
Future Funding Obligations	18,142,000
Senior Financing	0
Carrying Value	40,161,000	34,874,000
Total floating rate | Mezzanine Loan Due May 2023
Debt Investments Held [Abstract]
Future Funding Obligations	33,685,000
Senior Financing	137,783,000
Carrying Value	$ 30,749,000	$ 30,802,000