Notes Receivable, Net - Additional Information (Details) - USD ($)			9 Months Ended	12 Months Ended
		Jul. 12, 2021	Sep. 30, 2022	Dec. 31, 2022		Dec. 31, 2021	Dec. 31, 2020	Aug. 31, 2022	Jun. 30, 2022	Mar. 31, 2022
Accounts Notes And Loans Receivable [Line Items]
Increase in allowance for credit loss				$ (1,844,000)		$ (1,989,000)
Decrease in allowance for credit loss				4,900,000
Notes receivable				124,801,000		$ 159,638,000
OP Units in settlement of note receivable		21,109				21,109
Settlement amount of note receivable in OP units		$ 500,000				$ 500,000
Note receivable accrued interest				18,082,000		21,148,000
Notes receivable, net				123,903,000		153,886,000
Credit loss reserve				898,000		$ 5,752,000		$ 500,000
Amount of Unconsolidated Subsidiaries				7,500,000
Construction Loan Commitment				12,800,000
Interest Rate						9.00%
Aggregate loans				$ 123,903,000		$ 153,886,000
Prime Rate
Accounts Notes And Loans Receivable [Line Items]
Basis spread on variable rate				1.00%
Maturity date				Dec. 28, 2023
Core Note
Accounts Notes And Loans Receivable [Line Items]
Notes receivable modified, subsequent payment default				$ 21,600,000		21,600,000
Core Note One
Accounts Notes And Loans Receivable [Line Items]
Notes receivable						$ 13,500,000
Notes receivable maturity date						Jun. 01, 2022	Oct. 28, 2021
Core Note Two
Accounts Notes And Loans Receivable [Line Items]
Notes receivable				$ 54,000,000.0
Notes receivable maturity date				Jan. 09, 2024		Jan. 13, 2023
Fund II
Accounts Notes And Loans Receivable [Line Items]
Loan To Investors				$ 65,900,000
Fund V
Accounts Notes And Loans Receivable [Line Items]
Interest rate				8.00%
Bridge loan									$ 31,700,000	$ 52,000,000.0
Maximum
Accounts Notes And Loans Receivable [Line Items]
Maturity Date	[1]			2027-12
Interest Rate				9.00%	[1]	12.00%
Minimum
Accounts Notes And Loans Receivable [Line Items]
Maturity Date	[1]			2020-04
Interest Rate				4.65%	[1]	5.00%
Core Portfolio
Accounts Notes And Loans Receivable [Line Items]
Notes receivable	[1]			$ 124,801,000		$ 154,332,000
Note receivable accrued interest			$ 5,700,000
Notes receivable, net				13,500,000					$ 16,000,000.0
Aggregate loans				123,903,000
Core Portfolio | Silver Spring, Maryland
Accounts Notes And Loans Receivable [Line Items]
Notes receivable, net						16,000,000.0
Core Portfolio | Soho, New York
Accounts Notes And Loans Receivable [Line Items]
Notes receivable, net						43,000,000.0
Core Portfolio | Three Tranches
Accounts Notes And Loans Receivable [Line Items]
Notes receivable, net						42,000,000.0
Structured Financing
Accounts Notes And Loans Receivable [Line Items]
Note receivable accrued interest				4,100,000
Loans amortized cost				0
Aggregate loans				27,900,000
Structured Financing | Non-Collateral Dependent Loans
Accounts Notes And Loans Receivable [Line Items]
Note receivable accrued interest				11,900,000
Credit loss reserve				900,000
Loans amortized cost				112,900,000
Fund III
Accounts Notes And Loans Receivable [Line Items]
Increase in allowance for credit loss				4,600,000		$ 4,500,000
venture partner's interest obtained				$ 5,300,000
Equity method investment, ownership percentage				100.00%
Maturity Date						2020-07
Note receivable accrued interest				$ 4,700,000
Credit loss reserve				$ 4,600,000

[1] Includes one note receivable from an OP Unit holder, with a balance of $6.0 million at December 31, 2022 and 2021.