ACQUISITIONS (Details) (USD $)	6 Months Ended	12 Months Ended	0 Months Ended		6 Months Ended
	Jun. 30, 2014 In-place leases	Dec. 31, 2013 In-place leases	Apr. 18, 2014 Office building located in Los Angeles, CA item sqft	Jun. 30, 2014 Office building located in Los Angeles, CA	Jun. 30, 2014 Office building located in Los Angeles, CA In-place leases	Jun. 30, 2014 Office building located in Los Angeles, CA Below-market leases	Jun. 30, 2014 Office building located in Los Angeles, CA Land	Jun. 30, 2014 Office building located in Los Angeles, CA Land improvements	Jun. 30, 2014 Office building located in Los Angeles, CA Building and improvements	Jun. 30, 2014 Office building located in Los Angeles, CA Tenant improvements
Acquisitions
Fee-simple interest acquired (as a percent)				100.00%
Number of Buildings			1
Rentable Square Feet			143,000
Purchase Price			$ 44,936,000
Fair value of the assets acquired and liabilities assumed
Property, plant and equipment							16,633,000	348,000	27,947,000	691,000
Intangible assets					1,087,000	(1,770,000)
Total assets acquired				44,936,000
Weighted average amortization period	6 years	5 years			5 years	5 years
Acquisition related expenses				$ 32,000