SIGNIFICANT ACCOUNTING POLICIES (Details 4) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Acquired Finite-Lived Intangible Assets [Line Items]
Above and below market leases Increase (decrease) rental Income	$ (404)	$ (341)	$ (478)
Amortization expense for in-place lease intangibles	3,628	2,316	3,205
Projected amortization of in-place lease intangibles for the next five years [Abstract]
2013	2,479
2014	1,594
2015	1,284
2016	732
2017	393
Madison Distribution Center, Wiegman Distribution Center II and Valwood Distribution Center [Member]
Acquired operating properties [Abstract]
Total cost of properties purchased	51,750
Total amount allocated to real estate properties	48,934
Total purchase price to land	7,435
Acquisition-related costs expensed	188
Madison Distribution Center, Wiegman Distribution Center II and Valwood Distribution Center [Member] | Above Market Leases [Member]
Acquired operating properties [Abstract]
Intangibles acquired associated with purchase of Real Estate	244
Madison Distribution Center, Wiegman Distribution Center II and Valwood Distribution Center [Member] | Below Market Leases [Member]
Acquired operating properties [Abstract]
Intangibles acquired associated with purchase of Real Estate	733
Madison Distribution Center, Wiegman Distribution Center II and Valwood Distribution Center [Member] | Leases, Acquired-in-Place [Member]
Acquired operating properties [Abstract]
Intangibles acquired associated with purchase of Real Estate	3,305
Lakeview, Ridge Creek, Broadway VII, Tampa Industrial, and Rittiman [Member]
Acquired operating properties [Abstract]
Total cost of properties purchased		88,592
Total amount allocated to real estate properties		80,624
Total purchase price to land		13,872
Acquisition-related costs expensed		252
Lakeview, Ridge Creek, Broadway VII, Tampa Industrial, and Rittiman [Member] | Above Market Leases [Member]
Acquired operating properties [Abstract]
Intangibles acquired associated with purchase of Real Estate		1,693
Lakeview, Ridge Creek, Broadway VII, Tampa Industrial, and Rittiman [Member] | Below Market Leases [Member]
Acquired operating properties [Abstract]
Intangibles acquired associated with purchase of Real Estate		674
Lakeview, Ridge Creek, Broadway VII, Tampa Industrial, and Rittiman [Member] | Leases, Acquired-in-Place [Member]
Acquired operating properties [Abstract]
Intangibles acquired associated with purchase of Real Estate		6,949
Commerce Park 2 & 3, Ocean View Corporate Center and East University Distribution Center III [Member]
Acquired operating properties [Abstract]
Total cost of properties purchased			23,555
Total amount allocated to real estate properties			19,545
Total purchase price to land			7,914
Acquisition-related costs expensed			72
Commerce Park 2 & 3, Ocean View Corporate Center and East University Distribution Center III [Member] | Above Market Leases [Member]
Acquired operating properties [Abstract]
Intangibles acquired associated with purchase of Real Estate			923
Commerce Park 2 & 3, Ocean View Corporate Center and East University Distribution Center III [Member] | Below Market Leases [Member]
Acquired operating properties [Abstract]
Intangibles acquired associated with purchase of Real Estate			31
Commerce Park 2 & 3, Ocean View Corporate Center and East University Distribution Center III [Member] | Leases, Acquired-in-Place [Member]
Acquired operating properties [Abstract]
Intangibles acquired associated with purchase of Real Estate			$ 3,118