Notes Receivable, Net - Schedule of Notes Receivable (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) NotesReceivable	Nov. 02, 2020 USD ($)	Dec. 31, 2019 USD ($)
Accounts Notes And Loans Receivable [Line Items]
Total notes receivable	$ 102,100		$ 114,943
Allowance for credit loss	(650)
Notes receivable, net	$ 101,450		114,943
Number | NotesReceivable	7
Core Portfolio
Accounts Notes And Loans Receivable [Line Items]
Total notes receivable	$ 96,794		76,467
Number | NotesReceivable	6
Core Portfolio | Minimum
Accounts Notes And Loans Receivable [Line Items]
Maturity Date	2020-04
Interest Rate	2.81%
Core Portfolio | Maximum
Accounts Notes And Loans Receivable [Line Items]
Maturity Date	2027-12
Interest Rate	9.00%
Fund II
Accounts Notes And Loans Receivable [Line Items]
Total notes receivable		$ 33,800
Fund II | Fund Portfolio
Accounts Notes And Loans Receivable [Line Items]
Total notes receivable			33,170
Maturity Date	2020-12
Interest Rate	1.75%
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%