INVESTMENT IN UNCONSOLIDATED JOINT VENTURES - Investment in 353 Sacramento Joint Venture (Details)	Jun. 30, 2020	Jul. 06, 2017 a ft²
Migdal Members
Schedule of Equity Method Investments [Line Items]
Ownership percentage		45.00%
Joint Venture
Schedule of Equity Method Investments [Line Items]
Ownership percentage		55.00%
353 Sacramento Joint Venture
Schedule of Equity Method Investments [Line Items]
Ownership percentage	55.00%
353 Sacramento Joint Venture | Office Properties | Disposed of by Sale
Schedule of Equity Method Investments [Line Items]
Ownership percentage		45.00%
Net rentable area | ft²		284,751
Area of land | a		0.35