PRINCIPLES OF CONSOLIDATION (Details)	Mar. 31, 2019	Dec. 31, 2018
University Business Center 120 and 130 [Member]
Subsidiaries [Line Items]
Joint venture ownership interest	80.00%	80.00%
Joint ventures' assets, liabilities, revenues and expenses with noncontrolling interests	100.00%	100.00%
Industry Distribution Center II - undivided tenant [Member]
Subsidiaries [Line Items]
Tenant-in-common interest	50.00%	50.00%