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INVESTMENT IN UNCONSOLIDATED REAL ESTATE VENTURES - Mid-Atlantic Office JV (Details) $ in Thousands |  |  | 12 Months Ended
--- | --- | --- | ---
Aug. 09, 2024 USD ($) | Dec. 21, 2020 USD ($) ft² property | Dec. 31, 2024 USD ($) property | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Number of real estate properties | property |  |  | 64 |  |
Investment in real estate ventures, at equity |  |  | $ 570,455 | $ 552,494 |
Payments to acquire investment |  |  | 194,027 | 85,922 | $ 47,428
Philadelphia CBD |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Investment in real estate ventures, at equity |  |  | $ 452,334 | $ 450,136 |
Mid-Atlantic Office JV |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Equity method investment, ownership percentage |  | 40.00% | 40.00% |  |
Ownership percentage of total common equity |  | 20.00% |  |  |
Joint venture, funding from debt |  | $ 147,400 |  |  |
Proceeds from issuance of secured debt |  | $ 120,800 |  |  |
Equity method investment, debt forgiveness | $ 39,800 |  |  |  |
Payments to acquire investment | $ 4,100 |  |  |  |
Mid-Atlantic Office JV | Preferred Equity Securities |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Equity method investment, ownership percentage |  | 25.00% |  |  |
Investment in real estate ventures, at equity |  | $ 20,000 |  |  |
Mid-Atlantic Office JV | Common Equity Securities |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Equity method investment, ownership percentage |  | 15.00% |  |  |
Office Properties | Mid-Atlantic Office JV |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Number of real estate properties | property |  | 12 |  |  |
Rentable area (in square feet) | ft² |  | 1,128,645 |  |  |
Aggregate sales price |  | $ 192,900 |  |  |
Office Properties | Mid-Atlantic Office JV | Philadelphia CBD |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Number of real estate properties | property |  | 9 |  |  |
Office Properties | Mid-Atlantic Office JV | Metropolitan D C |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Number of real estate properties | property |  | 3 |  |  |

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