Debt and Preferred Equity Investments - Debt Investments (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate, interest rate	6.52%
Debt Investments Held [Abstract]
Carrying value	$ 1,088,723,000	$ 1,076,542,000
Carrying value	1,088,723,000	1,076,542,000
Mezzanine Loan Due June 2023
Debt Investments Held [Abstract]
Loan interest income	0
Mezzanine Loan Due June 2024
Debt Investments Held [Abstract]
Loan interest income	0
Amount participated out	12,000,000
Mezzanine Loan Due March 2022
Debt Investments Held [Abstract]
Amount participated out	400,000
Debt investment
Debt Investments Held [Abstract]
Future Funding Obligations	75,640,000
Senior Financing	4,664,200,000
Allowance for loan loss	(6,630,000)	(13,213,000)
Carrying value	815,717,000	816,756,000
Total fixed rate
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	2,929,431,000
Carrying value	527,377,000	477,509,000
Total fixed rate | Mezzanine Loan Due August 2022
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	280,000,000
Carrying value	43,521,000	41,057,000
Total fixed rate | Mortgage Loan, Due April 2023
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	0
Carrying value	73,000,000	0
Total fixed rate | Mezzanine Loan Due June 2023
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	376,705,000
Carrying value	225,367,000	225,204,000
Total fixed rate | Mezzanine Loan Due June 2023, 2
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	274,976,000
Carrying value	66,873,000	0
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 fixed rate | Junior Mortgage Paid Off
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	0
Carrying value	0	32,888,000
Total fixed rate | Mezzanine Loan Paid Off
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	0
Carrying value	0	3,500,000
Total fixed rate | Mortgage/Mezzanine Loan Due October 2021
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	0
Carrying value	0	56,244,000
Total floating rate
Debt Investments Held [Abstract]
Future Funding Obligations	75,640,000
Senior Financing	1,734,769,000
Carrying value	294,970,000	352,460,000
Total floating rate | Mezzanine Loan Due April 2022
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	275,000,000
Carrying value	49,998,000	49,956,000
Total floating rate | Mezzanine Loan Due July 2021, 2
Debt Investments Held [Abstract]
Future Funding Obligations	4,933,000
Senior Financing	180,415,000
Carrying value	37,511,000	35,318,000
Total floating rate | Mezzanine Loan Due March 2022
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	1,115,000,000
Carrying value	133,735,000	127,915,000
Total floating rate | Mortgage/Mezzanine Loan Due May 2022
Debt Investments Held [Abstract]
Future Funding Obligations	3,932,000
Senior Financing	54,000,000
Carrying value	8,050,000	6,858,000
Total floating rate | Mezzanine Loan Due December 2022
Debt Investments Held [Abstract]
Future Funding Obligations	23,360,000
Senior Financing	0
Carrying value	34,874,000	14,011,000
Total floating rate | Mezzanine Loan Due May 2023
Debt Investments Held [Abstract]
Future Funding Obligations	43,415,000
Senior Financing	110,354,000
Carrying value	30,802,000	19,889,000
Total floating rate | Junior Mortgage Participation/Mezzanine Loan Due July 2021
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	0
Carrying value	0	15,733,000
Total floating rate | Mezzanine Loan Due July 2021
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	0
Carrying value	0	29,106,000
Total floating rate | Mortgage Loan Paid Off
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	0
Carrying value	$ 0	$ 53,674,000