ACQUISITIONS AND DISPOSITIONS - Aggregate Purchase Price Allocations (Details) $ in Thousands	Sep. 30, 2018 USD ($)
Business Acquisition [Line Items]
Land	$ 2,819
Buildings and improvements	2,112
Total Purchase Price	4,931
938 Spring Valley Road
Business Acquisition [Line Items]
Land	519
Buildings and improvements	200
Total Purchase Price	719
116 Sunrise Highway
Business Acquisition [Line Items]
Land	151
Buildings and improvements	296
Total Purchase Price	447
197 West Spring Valley Ave
Business Acquisition [Line Items]
Land	1,768
Buildings and improvements	1,031
Total Purchase Price	2,799
7 Francis Place
Business Acquisition [Line Items]
Land	381
Buildings and improvements	585
Total Purchase Price	$ 966