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Notes Receivable and Current Expected Credit Losses - Schedule of Notes Receivable Outstanding (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Aug. 08, 2024 | Jul. 10, 2024 | Dec. 31, 2023 | Sep. 30, 2023 | Dec. 31, 2022
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Allowance for credit losses | $ (1,706) |  |  | $ (1,472) | $ (1,644) | $ (1,292)
Total notes receivable | 117,797 |  |  | 94,172 |  |
Allowance related to unfunded commitments | 551 |  |  | 732 | $ 857 | $ 338
Other liabilities |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Allowance related to unfunded commitments | 600 |  |  | 700 |  |
Mezzanine loan |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Principal | 89,590 |  |  |  |  |
Accrued interest and fees | 17,126 |  |  |  |  |
Notes receivable | 106,716 |  |  | 83,425 |  |
Maximum principal commitment | 121,900 |  |  |  |  |
Mezzanine loan | Solis Gainesville II |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Principal | 19,595 |  |  |  |  |
Accrued interest and fees | 5,041 |  |  |  |  |
Notes receivable | 24,636 |  |  | 22,268 |  |
Maximum principal commitment | $ 19,595 |  |  |  |  |
Interest rate | 14.00% |  |  |  |  |
Mezzanine loan | Solis Kennesaw |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Principal | $ 37,870 |  |  |  |  |
Accrued interest and fees | 6,230 |  |  |  |  |
Notes receivable | 44,100 |  |  | 15,922 |  |
Maximum principal commitment | $ 37,870 |  |  |  |  |
Interest rate | 14.00% |  |  |  |  |
Mezzanine loan | Solis Peachtree Corners |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Principal | $ 20,533 |  |  |  |  |
Accrued interest and fees | 3,917 |  |  |  |  |
Notes receivable | 24,450 |  |  | 11,092 |  |
Maximum principal commitment | $ 28,440 |  |  |  |  |
Interest rate | 15.00% |  |  |  |  |
Mezzanine loan | The Allure at Edinburgh |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Principal | $ 9,228 |  |  |  |  |
Accrued interest and fees | 1,639 |  |  |  |  |
Notes receivable | 10,867 |  |  | 9,830 |  |
Maximum principal commitment | $ 9,228 |  |  |  |  |
Interest rate | 15.00% |  |  |  |  |
Mezzanine loan | Solis City Park II |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Principal | $ 0 |  |  |  |  |
Accrued interest and fees | 0 |  |  |  |  |
Notes receivable | 0 |  |  | 24,313 |  |
Maximum principal commitment | $ 0 |  | $ 25,800 |  |  |
Interest rate | 13.00% |  |  |  |  |
Mezzanine loan | Solis North Creek |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Principal | $ 2,364 |  |  |  |  |
Accrued interest and fees | 299 |  |  |  |  |
Notes receivable | 2,663 |  |  | 0 |  |
Maximum principal commitment | $ 26,767 | $ 26,800 | $ 27,000 |  |  |
Interest rate | 12.00% |  |  |  |  |
Other notes receivable |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Notes receivable | $ 12,787 |  |  | $ 12,219 |  |

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