Acquisitions and Dispositions (Summary of Significant Assumptions Utilized in Estimates) (Details)	3 Months Ended
Mar. 31, 2017 $ / sqft months
Minimum [Member]
Property, Plant and Equipment [Line Items]
Fair Value Inputs, Discount Rate	5.81%
Fair Value Inputs, Cap Rate	4.31%
Fair Value Measurement With Unobservable Inputs Lease up Period in Months \| months	9
Maximum [Member]
Property, Plant and Equipment [Line Items]
Fair Value Inputs, Discount Rate	6.82%
Fair Value Inputs, Cap Rate	5.32%
Fair Value Measurement With Unobservable Inputs Lease up Period in Months \| months	12
Industrial [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Fair Value Measurement With Unobservable Inputs Rental Rate Per Square Foot \| $ / sqft	3.50
Industrial [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Fair Value Measurement With Unobservable Inputs Rental Rate Per Square Foot \| $ / sqft	5.70

Fair Value Measurement With Unobservable Inputs Lease up Period in Months

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- Definition

Fair Value Measurement With Unobservable Inputs Rental Rate Per Square Foot

+ References

No definition available.

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- Definition

Ratio of the net operating income produced by an asset and its capital cost (original prices paid to buy the asset), used as an input to measure fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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- Definition

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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