Notes Receivable, Net - Schedule of Notes Receivable (Parenthetical) (Details) $ in Thousands		Sep. 30, 2021 USD ($) NotesReceivable	Dec. 31, 2020 USD ($) NotesReceivable
Accounts Notes And Loans Receivable [Line Items]
Number of notes receivable | NotesReceivable		8
Notes receivable | $		$ 159,638	$ 102,100
Core Portfolio
Accounts Notes And Loans Receivable [Line Items]
Number of notes receivable | NotesReceivable	[1]	7
Notes receivable | $	[1]	$ 154,332	$ 96,794
OP Unit Holders
Accounts Notes And Loans Receivable [Line Items]
Number of notes receivable | NotesReceivable		1	2
OP Unit Holders | Core Portfolio
Accounts Notes And Loans Receivable [Line Items]
Notes receivable | $		$ 6,000	$ 6,500

[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