INVESTMENT IN UNCONSOLIDATED REAL ESTATE VENTURES - Cira Square (Details)		12 Months Ended
	Mar. 17, 2022 USD ($) ft²	Dec. 31, 2023 USD ($) ft²	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Jun. 02, 2023 USD ($)
Schedule of Equity Method Investments [Line Items]
Area of real estate property | ft²		13,011,094
Purchase price		$ 7,747,000	$ 3,446,000	$ 0
Secured fix rate debt
Schedule of Equity Method Investments [Line Items]
Debt instrument, face amount					$ 220,000,000
Cira Square REIT, LLC
Schedule of Equity Method Investments [Line Items]
Cost	$ 383,000,000
Equity method investment, ownership percentage	20.00%
Purchase price	$ 28,600,000
Interest rate, maximum	6.75%
Cira Square REIT, LLC | Secured Overnight Financing Rate (SOFR)
Schedule of Equity Method Investments [Line Items]
Basis spread on interest rate (as percent)	3.50%
Cira Square REIT, LLC | Secured fix rate debt
Schedule of Equity Method Investments [Line Items]
Debt instrument, face amount	$ 257,700,000
Office Properties | Cira Square REIT, LLC
Schedule of Equity Method Investments [Line Items]
Area of real estate property | ft²	862,692