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COMMITMENTS AND CONTINGENCIES (Details) - USD ($) | 9 Months Ended |  |  |
--- | --- | --- | --- | ---
Sep. 30, 2025 | Dec. 31, 2024 | Jun. 30, 2024 | Jul. 23, 2021
Loss Contingencies [Line Items] |  |  |  |
Investment in real estate ventures | $ 594,203,000 | $ 570,455,000 |  |
Drexel Square |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Contractual obligation | 5,000,000.0 |  |  |
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 | 4,200,000 |  |  |
3151 Market Street |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Investment in real estate ventures |  | $ 317,000,000 |  |
Development costs funded | $ 218,200,000 |  |  |
Percentage expected to be funded by third party secured financing | 50.00% |  |  |
Brandywine Realty Trust | 3151 Market Street |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Equity funding percentage expected to be funded | 65.00% |  |  |
Brandywine Realty Trust Partner | 3151 Market Street |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Development costs funded | $ 50,000,000 |  |  |
Equity funding percentage expected to be funded | 35.00% |  |  |
Affiliated Entity | 3025 JFK Venture |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Construction loan | $ 178,000,000 |  |  | $ 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 | $ 764,500,000 |  |  |
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 |  |  |

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