Debt and Preferred Equity Investments - Debt Investment (Details) - USD ($)	3 Months Ended		9 Months Ended		26 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 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)			6.32%
Debt Investments Held [Abstract]
Carrying Value, Fixed Rate	$ 663,985,000		$ 663,985,000		$ 663,985,000	$ 1,088,723,000
Carrying Value	663,985,000		663,985,000		663,985,000	1,088,723,000
Investment income	29,513,000	$ 20,072,000	69,808,000	$ 59,452,000
Debt Investments in Mortgage Loans
Debt Investments Held [Abstract]
Future Funding Obligations	34,610,000		34,610,000		34,610,000
Senior Financing	1,663,818,000		1,663,818,000		1,663,818,000
Carrying Value	546,096,000		546,096,000		546,096,000	815,717,000
Allowance for loan loss	(6,630,000)		(6,630,000)		(6,630,000)	(6,630,000)
Mezzanine Loan Due June 2024
Debt Investments Held [Abstract]
Amount participated out	12,400,000		12,400,000		12,400,000
Loan interest income					0
Total fixed rate
Debt Investments Held [Abstract]
Future Funding Obligations	0		0		0
Senior Financing	961,001,000		961,001,000		961,001,000
Carrying Value, Fixed Rate	363,123,000		363,123,000		363,123,000	527,377,000
Total fixed rate | Mezzanine Loan Due June 2023
Debt Investments Held [Abstract]
Future Funding Obligations	0		0		0
Senior Financing	394,854,000		394,854,000		394,854,000
Carrying Value, Fixed Rate	225,367,000		225,367,000		225,367,000	225,367,000
Investment income					0
Total fixed rate | Mezzanine Loan Due June 2023, 2
Debt Investments Held [Abstract]
Future Funding Obligations	0		0		0
Senior Financing	281,147,000		281,147,000		281,147,000
Carrying Value, Fixed Rate	74,390,000		74,390,000		74,390,000	66,873,000
Total fixed rate | Mezzanine Loan Due June 2024
Debt Investments Held [Abstract]
Future Funding Obligations	0		0		0
Senior Financing	105,000,000		105,000,000		105,000,000
Carrying Value, Fixed Rate	13,366,000		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		0
Senior Financing	95,000,000		95,000,000		95,000,000
Carrying Value, Fixed Rate	30,000,000		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		0
Senior Financing	85,000,000		85,000,000		85,000,000
Carrying Value, Fixed Rate	20,000,000		20,000,000		20,000,000	20,000,000
Total fixed rate | Mezzanine Loan Repaid In 2022
Debt Investments Held [Abstract]
Future Funding Obligations	0		0		0
Senior Financing	0		0		0
Carrying Value, Fixed Rate	0		0		0	43,521,000
Total fixed rate | Mortgage Loan Repaid In 2022
Debt Investments Held [Abstract]
Future Funding Obligations	0		0		0
Senior Financing	0		0		0
Carrying Value, Fixed Rate	0		0		0	73,000,000
Total fixed rate | Mezzanine Loan Repaid In 2022, 2
Debt Investments Held [Abstract]
Future Funding Obligations	0		0		0
Senior Financing	0		0		0
Carrying Value, Fixed Rate	0		0		0	55,250,000
Total floating rate
Debt Investments Held [Abstract]
Future Funding Obligations	34,610,000		34,610,000		34,610,000
Senior Financing	702,817,000		702,817,000		702,817,000
Carrying Value	189,603,000		189,603,000		189,603,000	294,970,000
Total floating rate | Mezzanine Loan Repaid In 2022
Debt Investments Held [Abstract]
Future Funding Obligations	0		0		0
Senior Financing	0		0		0
Carrying Value	0		0		0	133,735,000
Total floating rate | Mortgage/Mezzanine Loan Due December 2022
Debt Investments Held [Abstract]
Future Funding Obligations	8,257,000		8,257,000		8,257,000
Senior Financing	0		0		0
Carrying Value	50,186,000		50,186,000		50,186,000	34,874,000
Total floating rate | Mortgage Loan Due April 2023
Debt Investments Held [Abstract]
Future Funding Obligations	0		0		0
Senior Financing	275,000,000		275,000,000		275,000,000
Carrying Value	50,000,000		50,000,000		50,000,000	49,998,000
Total floating rate | Mezzanine Loan Due May 2023
Debt Investments Held [Abstract]
Future Funding Obligations	3,761,000		3,761,000		3,761,000
Senior Financing	54,000,000		54,000,000		54,000,000
Carrying Value	8,243,000		8,243,000		8,243,000	8,050,000
Total floating rate | Mezzanine Loan Due May 2023, 2
Debt Investments Held [Abstract]
Future Funding Obligations	22,592,000		22,592,000		22,592,000
Senior Financing	187,733,000		187,733,000		187,733,000
Carrying Value	42,091,000		42,091,000		42,091,000	30,802,000
Total floating rate | Mezzanine Loan Due July 2023
Debt Investments Held [Abstract]
Future Funding Obligations	0		0		0
Senior Financing	186,084,000		186,084,000		186,084,000
Carrying Value	$ 39,083,000		$ 39,083,000		$ 39,083,000	$ 37,511,000