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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details) $ in Thousands |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Jan. 31, 2024 USD ($) unit | Aug. 31, 2024 USD ($) | Jan. 31, 2024 USD ($) unit | Sep. 30, 2024 USD ($) jointVenture shares | Sep. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) jointVenture shares | Sep. 30, 2023 USD ($) | Dec. 31, 2023 USD ($) shares
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Investment in short-term deposits |  | $ 350,000 | $ 265,000 |  |  | $ 615,000 | $ 0 |
Short-term deposits, interest rate (as a percent) | 5.34% | 5.05% | 5.34% |  |  |  |  |
Interest income |  |  |  | $ 2,200 |  | $ 6,300 |  |
Variable interest entity, number of entities | jointVenture |  |  |  | 2 |  | 2 |  |
Assets of VIEs |  |  |  | $ 7,129,734 |  | $ 7,129,734 |  | $ 6,944,078
Number of investments in unconsolidated joint ventures | jointVenture |  |  |  | 4 |  | 4 |  |
Gain on sale |  |  |  |  |  | $ (864) | 22,468 |
Gain on sale of unconsolidated property |  |  |  | $ 0 | $ 0 | 2,325 | 0 |
Distribution from unconsolidated joint venture |  |  |  |  |  | $ 1,618 | $ 0 |
Limited partners' capital account, units outstanding (in shares) | shares |  |  |  | 3,960,037 |  | 3,960,037 |  | 3,512,868
Glendale Center Apartments |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Ownership percentage in equity method investment (as a percent) | 11.50% |  | 11.50% |  |  |  |  |
Gain on sale | $ 20,200 |  |  |  |  |  |  |
Gain on sale of unconsolidated property |  |  |  |  |  | $ 2,300 |  |
Distribution from unconsolidated joint venture |  |  |  |  |  | $ 1,600 |  |
Glendale Center Apartments | Multifamily |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Number of multifamily rental units | unit | 267 |  | 267 |  |  |  |  |
One Loudoun Downtown - Pads G & H |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Noncontrolling interest, ownership percentage by parent (as a percent) |  |  |  | 90.00% |  | 90.00% |  |
Operating Partnership |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Noncontrolling interest, ownership percentage by parent (as a percent) |  |  |  | 98.20% |  | 98.20% |  | 98.40%
Noncontrolling interest, ownership percentage by limited partners (as a percent) |  |  |  | 1.80% |  | 1.80% |  | 1.60%
Variable Interest Entities |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Mortgage debt of VIEs |  |  |  | $ 110,300 |  | $ 110,300 |  |
Assets of VIEs |  |  |  | $ 218,100 |  | $ 218,100 |  |

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