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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Real Estate Related Notes Receivable (Details) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2025 | Dec. 31, 2024 | Dec. 31, 2023
MultiFamily Non-Same-Store | Lydian - Denver, CO | Tax Increment Financing |  |  |
MORTGAGE RECEIVABLE AND NOTES RECEIVABLE |  |  |
Interest rate | 6.00% | 6.00% |
Loan commitment | $ 4.0 | $ 4.1 |
MultiFamily Same-Store | Ironwood | Tax Increment Financing |  |  |
MORTGAGE RECEIVABLE AND NOTES RECEIVABLE |  |  |
Interest rate | 4.50% |  |
Loan commitment | $ 5.1 | 5.2 |
Multi-Family Residential | Inver Grove Heights Minnesota | Mezzanine Loan |  |  |
MORTGAGE RECEIVABLE AND NOTES RECEIVABLE |  |  |
Mortgage loans receivable at fair value | $ 15.1 | $ 15.1 |
Interest rate | 10.00% |  |
Mortgage loans receivable face amount |  |  | $ 15.1
Percent of membership interest pledged as collateral | 100.00% |  |
Co-venturer |  |  |
MORTGAGE RECEIVABLE AND NOTES RECEIVABLE |  |  |
Mortgage loans receivable at fair value | $ 1.4 |  |
Interest rate | 1.55% |  |

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