BUSINESS COMBINATIONS AND ACQUIRED INTANGIBLES (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Business Acquisition [Line Items]
Amortization expense for lease intangibles	$ 977,000	$ 475,000	$ 2,046,000	$ 1,032,000
Above and below market leases Increase (decrease) rental Income	(114,000)	(85,000)	(234,000)	(185,000)
Acquisition-related costs expensed	0	0	19,000	0
Madison Distribution Center [Member]
Business Acquisition [Line Items]
Total cost of properties purchased	3,475,000		3,475,000
Amount of total cost allocated to real estate properties	3,273,000		3,273,000
Amount of total cost allocated to land	495,000		495,000
Madison Distribution Center [Member] | Leases, Acquired-in-Place [Member]
Business Acquisition [Line Items]
Intangible acquired associated with purchase of Real Estate	190,000		190,000
Madison Distribution Center [Member] | Leases, Above Market [Member]
Business Acquisition [Line Items]
Intangible acquired associated with purchase of Real Estate	20,000		20,000
Madison Distribution Center [Member] | Leases, Below Market [Member]
Business Acquisition [Line Items]
Intangible acquired associated with purchase of Real Estate	$ 8,000		$ 8,000