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COMMITMENTS AND CONTINGENCIES (Details) - USD ($) | 3 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Mar. 31, 2025 | Dec. 31, 2024 | Jun. 30, 2024 | Jun. 28, 2024 | Jul. 23, 2021
Loss Contingencies [Line Items] |  |  |  |  |
Investment in real estate ventures | $ 570,370,000 | $ 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 | 2,800,000 |  |  |  |
3151 Market Street |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Investment in real estate ventures |  | $ 316,900,000 |  |  |
Development costs funded | $ 210,600,000 |  |  |  |
Percentage expected to be funded by third party secured financing | 50.00% |  |  |  |
Expected return of payments to develop joint ventures | $ 52,100,000 |  |  |  |
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 | $ 49,900,000 |  |  |  |
Equity funding percentage expected to be funded | 35.00% |  |  |  |
Affiliated Entity | 3025 JFK Venture |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Construction loan |  |  |  |  | $ 186,700,000
3025 JFK Venture |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Construction loan, extension option | 1 year |  |  |  |
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 | $ 764,100,000 |  |  |  |
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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- Definition Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions. + References No definition available. + Details
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