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COMMITMENTS AND CONTINGENCIES (Details) - USD ($) | Sep. 30, 2024 | Aug. 26, 2024 | Jun. 30, 2024 | Dec. 31, 2023 | Jul. 23, 2021
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Loss Contingencies [Line Items] |  |  |  |  |
Investment in real estate ventures | $ 602,700,000 |  |  | $ 552,494,000 |
Drexel Square |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Contractual obligation | 5,600,000 |  |  |  |
Estimated potential additional contribution obligation | 2,000,000.0 |  |  |  |
Preferred Equity Investment Obligation |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Contractual obligation | 15,000,000 |  |  |  |
Commitment funded amount | 2,500,000 |  |  |  |
3151 Market Street |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Investment in real estate ventures | 316,900,000 |  |  |  |
3151 Market Street | Scenario, Plan |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Debt instrument, face amount | $ 174,300,000 |  |  |  |
Loan to value ratio | 55.00% |  |  |  |
Affiliated Entity | 3025 JFK Venture |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Construction loan |  |  |  |  | $ 186,700,000
3025 JFK Venture |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Limited payment guarantee, percent of principle balance (up to) |  |  |  |  | 25.00%
One Uptown Venture | Carry Guarantee |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Limited payment guarantee, percent of principle balance (up to) |  |  |  |  | 30.00%
Construction loan amount |  |  |  |  | $ 121,700,000
One Uptown Venture | Payment Guarantee |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Limited payment guarantee, percent of principle balance (up to) |  |  |  |  | 15.00%
Construction loan amount |  |  |  |  | $ 85,000,000
Unconsolidated Real Estate Ventures |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Unconsolidated real estate venture debt at 100%, gross | $ 890,800,000 |  |  |  |
MAP Venture |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Investment in real estate ventures |  |  | $ 0 |  |
MAP Venture | Fixed rate debt |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Debt instrument, interest rate, stated percentage | 8.00% |  |  |  |
MAP Venture | Additional Funding For Tenant And Capital Improvement Of Properties |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Other commitments | $ 12,000,000 |  |  |  |
Commerce Square Venture |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Investment in real estate ventures |  | $ 23,000,000 |  |  |

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