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PRINCIPLES OF CONSOLIDATION (Details) | Sep. 30, 2018 | Dec. 31, 2017
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University Business Center 125 and 175 [Member] |  |
Subsidiaries [Line Items] |  |
Noncontrolling interest, ownership percentage acquired during period |  | 20.00%
Ownership percentage | 100.00% | 100.00%
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%

X
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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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