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Segment Information - Additional Information (Detail) | 3 Months Ended
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Mar. 31, 2015 Segment
Segment Reporting [Abstract] |
Number of reportable segments | 2 us-gaap_NumberOfReportableSegments
Quantitative threshold of revenues, profit or loss and assets for identifying reportable segments | Each consolidated shopping center is considered a separate operating segment; however, each shopping center on a stand-alone basis represents less than 10% of the revenues, profit or loss, and assets of the combined reported operating segment and meets the majority of the aggregation criteria under the applicable standard.

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- Definition Description of the factors used to identify reportable segments, including the basis of organization (for example, whether management has chosen to organize the enterprise around differences in products and services, geographic areas, regulatory environments, or a combination of factors and whether operating segments have been aggregated to reportable segments). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8721-108599 + Details
Name: | us-gaap_FactorsUsedToIdentifyEntitysReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_SegmentReportingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration