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Commitments and Contingencies (Details Textual) (USD $) In Millions, unless otherwise specified	Aug. 07, 2012 sqft Property Contract Building	Aug. 02, 2012 sqft Building	Jul. 31, 2012 sqft Building	Jul. 23, 2012 Building sqft	Jul. 03, 2012 sqft Building
Commitments and Contingencies (Textual) [Abstract]
Outstanding contracts with a third-party sellers	2
Number of industrial properties under contract	2	1	1	1	3
Square feet	203,291	24,277	103,200	74,679	171,707
Number of buildings for sale	1
Property Sales Price	$ 17.2

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Number of buildings for sale.

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Number of real estate contract.

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Property sales price.

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Area of a real estate property.

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The number of real estate properties owned as of the balance sheet date.

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