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COMMITMENTS AND CONTINGENCIES (Details) $ in Thousands |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Oct. 21, 2020 USD ($) | Feb. 28, 2021 property | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Jul. 23, 2021 USD ($) | Sep. 30, 2004 ft²
Property Subject to or Available for Operating Lease [Line Items] |  |  |  |  |  |
Real estate ventures aggregate indebtedness |  |  | $ 1,204,779 | $ 961,509 |  |
Limited payment guarantee, percent of principle balance (up to) |  |  |  |  | 25.00% |
Commerce Square | Preferred Equity Investment Obligation |  |  |  |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |  |  |  |
Other commitments |  |  | 20,000 |  |  |
Amount committed to date |  |  | 7,200 |  |  |
Schuylkill Yards Project |  |  |  |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |  |  |  |
Other commitments |  |  | 6,600 |  |  |
Estimated potential additional contribution obligation |  |  | 2,200 |  |  |
Natural Disasters and Other Casualty Events |  |  |  |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |  |  |  |
Number of properties damaged | property |  | 1 |  |  |  |
Write-off of fixed assets |  |  |  | 1,200 |  |
Restoration liability |  |  | 800 | 7,200 |  |
Business interruption costs |  |  |  | 3,900 |  |
Insurance proceeds |  |  | 2,800 | 15,300 |  |
Natural Disasters and Other Casualty Events | Other Income |  |  |  |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |  |  |  |
Insurance proceeds |  |  |  | 3,000 |  |
Natural Disasters and Other Casualty Events | Accounts Payable and Accrued Liabilities |  |  |  |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |  |  |  |
Restoration liability |  |  |  | $ 1,900 |  |
3025 JFK Venture |  |  |  |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |  |  |  |
Construction loan amount |  |  | 186,700 |  | $ 186,700 |
Unconsolidated Real Estate Ventures |  |  |  |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |  |  |  |
Real estate ventures aggregate indebtedness |  |  | 1,204,800 |  |  |
Two Logan Square |  |  |  |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |  |  |  |
Rentable square feet | ft² |  |  |  |  |  | 708,844
Settlement liabilities |  |  | $ 600 |  |  |
Two Logan Square | Secured Debt |  |  |  |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |  |  |  |
Repayments of long-term debt | $ 79,800 |  |  |  |  |

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