Segment Information - Additional Information (Detail)	12 Months Ended
Dec. 31, 2014 Segment
Segment Reporting [Abstract]
Number of reportable segments	2us-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 and follows the accounting policies described in Note 1; 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.

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).

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

Name:	us-gaap_FactorsUsedToIdentifyEntitysReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration