BUSINESS COMBINATIONS AND ACQUIRED INTANGIBLES (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Business Acquisition [Line Items]
Amortization expense for lease intangibles	$ 778,000	$ 1,069,000
Above and below market leases Increase (decrease) rental Income	(46,000)	(120,000)
Acquisition-related costs expensed	29,000	19,000
Madison Distribution Center, Wiegman Distribution Center II and Valwood Distribution Center [Member]
Business Acquisition [Line Items]
Total cost of properties purchased		51,750,000
Amount of total cost allocated to real estate properties		48,934,000
Amount of total cost allocated to land		7,435,000
Madison Distribution Center, Wiegman Distribution Center II and Valwood Distribution Center [Member] | Leases, Acquired-in-Place [Member]
Business Acquisition [Line Items]
Intangible acquired associated with purchase of Real Estate		3,305,000
Madison Distribution Center, Wiegman Distribution Center II and Valwood Distribution Center [Member] | Above Market Leases [Member]
Business Acquisition [Line Items]
Intangible acquired associated with purchase of Real Estate		244,000
Madison Distribution Center, Wiegman Distribution Center II and Valwood Distribution Center [Member] | Below Market Leases [Member]
Business Acquisition [Line Items]
Intangible acquired associated with purchase of Real Estate		$ 733,000