BUSINESS COMBINATIONS AND ACQUIRED INTANGIBLES (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Business Acquisition [Line Items]
Amortization expense for lease intangibles	$ 881,000	$ 661,000	$ 2,927,000	$ 1,693,000
Above and below market leases Increase (decrease) rental Income	(91,000)	(71,000)	(325,000)	(256,000)
Acquisition-related costs expensed	45,000	55,000	64,000	55,000
Madison Distribution Center [Member]
Business Acquisition [Line Items]
Total cost of properties purchased	10,950,000		10,950,000
Amount of total cost allocated to real estate properties	10,167,000		10,167,000
Amount of total cost allocated to land	3,073,000		3,073,000
Madison Distribution Center [Member] | Leases, Acquired-in-Place [Member]
Business Acquisition [Line Items]
Intangible acquired associated with purchase of Real Estate	672,000		672,000
Madison Distribution Center [Member] | Leases, Above Market [Member]
Business Acquisition [Line Items]
Intangible acquired associated with purchase of Real Estate	119,000		119,000
Madison Distribution Center [Member] | Leases, Below Market [Member]
Business Acquisition [Line Items]
Intangible acquired associated with purchase of Real Estate	8,000		8,000
Lakeview, Ridge Creek, Broadway VII, Tampa Industrial, and Rittiman [Member]
Business Acquisition [Line Items]
Total cost of properties purchased		88,592,000		88,592,000
Amount of total cost allocated to real estate properties		80,624,000		80,624,000
Amount of total cost allocated to land		13,872,000		13,872,000
Lakeview, Ridge Creek, Broadway VII, Tampa Industrial, and Rittiman [Member] | Leases, Acquired-in-Place [Member]
Business Acquisition [Line Items]
Intangible acquired associated with purchase of Real Estate		6,949,000		6,949,000
Lakeview, Ridge Creek, Broadway VII, Tampa Industrial, and Rittiman [Member] | Above Market Leases [Member]
Business Acquisition [Line Items]
Intangible acquired associated with purchase of Real Estate		1,693,000		1,693,000
Lakeview, Ridge Creek, Broadway VII, Tampa Industrial, and Rittiman [Member] | Below Market Leases [Member]
Business Acquisition [Line Items]
Intangible acquired associated with purchase of Real Estate		$ 674,000		$ 674,000