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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Mortgage Loans Receivable and Notes Receivable (Details) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Mar. 31, 2020
Multi Family Same-Store | Ironwood | Tax Increment Financing |  |  |
Real Estate Properties [Line Items] |  |  |
Loan commitment | $ 5.7 | $ 6.1 | $ 6.6
Interest rate on mortgages payable | 4.50% |  |
Multi Family Residential | Inver Grove Heights, Minnesota | Mezzanine Loan |  |  |
Real Estate Properties [Line Items] |  |  |
Interest rate on mortgages payable | 10.00% |  |
Mortgage loans receivable | $ 15.1 |  |
Multi Family Residential | Inver Grove Heights, Minnesota | Mezzanine Loan | Other Assets |  |  |
Real Estate Properties [Line Items] |  |  |
Mortgage loans receivable | $ 1.6 |  |

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