Notes Receivable, Net - Schedule of Notes Receivable (Details) $ in Thousands		9 Months Ended
		Sep. 30, 2021 USD ($) NotesReceivable	Dec. 31, 2020 USD ($)
Accounts Notes And Loans Receivable [Line Items]
Total notes receivable		$ 159,638	$ 102,100
Allowance for credit loss		(1,170)	(650)
Notes receivable, net		$ 158,468	101,450
Number | NotesReceivable		8
Interest Rate		9.00%
Minimum
Accounts Notes And Loans Receivable [Line Items]
Interest Rate		5.00%
Maximum
Accounts Notes And Loans Receivable [Line Items]
Interest Rate		12.00%
Core Portfolio
Accounts Notes And Loans Receivable [Line Items]
Total notes receivable	[1]	$ 154,332	96,794
Number | NotesReceivable	[1]	7
Core Portfolio | Minimum
Accounts Notes And Loans Receivable [Line Items]
Maturity Date		2020-04
Interest Rate	[1]	5.00%
Core Portfolio | Maximum
Accounts Notes And Loans Receivable [Line Items]
Maturity Date		2027-12
Interest Rate	[1]	12.00%
Fund III | Fund Portfolio
Accounts Notes And Loans Receivable [Line Items]
Total notes receivable		$ 5,306	$ 5,306
Number | NotesReceivable		1
Maturity Date		2020-07
Interest Rate		18.00%

[1] Includes one and two notes receivable from OP Unit holders, with balances totaling $6.0 million and $6.5 million at September 30, 2021 and December 31, 2020, respectively