INVESTMENT IN UNCONSOLIDATED REAL ESTATE VENTURES - Commerce Square Venture (Details)	Dec. 31, 2021 property	Jul. 21, 2021 property	Dec. 21, 2020 ft²	Jul. 21, 2020 ft²
Schedule of Equity Method Investments [Line Items]
Sale of ownership interest percentage			60.00%
Number of real estate properties	81
Commerce Square
Schedule of Equity Method Investments [Line Items]
Sale of ownership interest percentage				30.00%
Commerce Square | Office Properties
Schedule of Equity Method Investments [Line Items]
Rentable square feet | ft²			1,896,142	1,896,142
Number of real estate properties		2
Commerce Square
Schedule of Equity Method Investments [Line Items]
Ownership percentage	70.00%
Commerce Square | Preferred Equity Securities
Schedule of Equity Method Investments [Line Items]
Ownership percentage	32.00%
Commerce Square | Common Equity Securities
Schedule of Equity Method Investments [Line Items]
Ownership percentage	38.00%