ACQUISITIONS (Details) (USD $)	9 Months Ended	12 Months Ended	0 Months Ended			9 Months Ended
	Sep. 30, 2014 Acquired In-Place Leases	Dec. 31, 2013 Acquired In-Place Leases	Apr. 18, 2014 Office building located in Los Angeles, CA item sqft	Sep. 30, 2014 Office building located in Los Angeles, CA	Apr. 18, 2014 Office building located in Los Angeles, CA sqft	Sep. 30, 2014 Office building located in Los Angeles, CA Acquired In-Place Leases	Sep. 30, 2014 Office building located in Los Angeles, CA Below-market leases	Sep. 30, 2014 Office building located in Los Angeles, CA Land	Sep. 30, 2014 Office building located in Los Angeles, CA Land improvements	Sep. 30, 2014 Office building located in Los Angeles, CA Buildings and improvements	Sep. 30, 2014 Office building located in Los Angeles, CA Tenant improvements	Sep. 30, 2013 First mortgage note secured by hotel located near Los Angeles Airport
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)
Net assets acquired				44,936,000
Weighted average amortization period	6 years	5 years				5 years	5 years
Acquisition related expenses				$ 32,000								$ 1,393,000