Investments in real estate, net Acquisitions (Details) $ in Millions	9 Months Ended
Sep. 30, 2015 USD ($) property
Business Acquisition [Line Items]
Payments to acquire real estate property	$ 438.1
Number of Land Parcels	2
Operating properties [Member]
Business Acquisition [Line Items]
Number of Businesses Acquired	1
Redevelopment [Member]
Business Acquisition [Line Items]
Number of Real Estate Properties \| property	2
Noncontrolling Interests
Business Acquisition [Line Items]
Number of Businesses Acquired	7

Number of Land Parcels

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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

No definition available.

+ Details

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- Definition

The number of businesses acquired by the entity during the period.

+ References

No definition available.

+ Details

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

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