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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

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