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Acquisitions - Summary of Acquired Shopping Centers (Detail) (Shopping Centers [Member], USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014
Business Acquisition [Line Items]
Gross Purchase Price	$ 246.4
Face Value of Mortgage Debt Assumed	48.4
Colorado Springs [Member] | Colorado [Member]
Business Acquisition [Line Items]
Date Acquired	April 2014
Gross Purchase Price	29.4
Face Value of Mortgage Debt Assumed	12.9
Roseville [Member] | California [Member]
Business Acquisition [Line Items]
Date Acquired	May 2014
Gross Purchase Price	89.5
Face Value of Mortgage Debt Assumed	0
Cincinnati [Member] | Ohio [Member]
Business Acquisition [Line Items]
Date Acquired	May 2014
Gross Purchase Price	29.5
Face Value of Mortgage Debt Assumed	0
Chicago [Member] | Illinois [Member]
Business Acquisition [Line Items]
Date Acquired	June 2014
Gross Purchase Price	98.0
Face Value of Mortgage Debt Assumed	$ 35.5

X

- Definition

Business acquisition, date of acquisition.

+ References

No definition available.

+ Details

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X

- Definition

Business acquisitions, cost of acquired entity, purchase price gross.

+ References

No definition available.

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- Details

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- Definition

The amount of debt that an Entity assumes in acquiring a business or in consideration for an asset received in a noncash (or part noncash) acquisition. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

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