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REAL ESTATE INVESTMENTS - Schedule of Properties Acquired (Details) $ in Thousands |  |  | 9 Months Ended |
--- | --- | --- | --- | ---
Apr. 29, 2022 USD ($) | Jan. 21, 2022 USD ($) a | Sep. 30, 2022 USD ($) ft² | Sep. 30, 2021 USD ($) | Apr. 29, 2022 ft² | Apr. 29, 2022 a
Real Estate [Line Items] |  |  |  |  |  |
Purchase Price |  |  | $ 3,446 | $ 0 |  |
Rentable area (in square feet) | ft² |  |  | 13,664,209 |  |  |
Land | 631 Park Avenue |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |
Rentable Square Feet/Acres | a |  | 3.3 |  |  |  |
Purchase Price |  | $ 3,650 |  |  |  |
Land | 3151 Market Street |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |
Rentable Square Feet/Acres |  |  |  |  | 0.8 | 0.8
Purchase Price | $ 27,349 |  |  |  |  |
Lease agreement term | 99 years |  |  |  |  |
Prepaid rent | $ 19,500 |  |  |  |  |
Rentable area (in square feet) | ft² |  |  |  |  | 500,000 |
Land | Schuylkill Yards Project |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |
Rentable area (in square feet) | ft² |  |  |  |  | 200,000 |
Operating lease costs, capitalized | $ 7,800 |  |  |  |  |

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