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Discontinued Operations and Disposition of Real Estate and Real Estate Investments - Additional Information (Detail)	12 Months Ended		36 Months Ended
	Dec. 31, 2013 Property	Dec. 31, 2012 Property	Dec. 31, 2013 Property	Dec. 31, 2011 Property
Discontinued Operations And Disposal Groups [Abstract]
Number of properties sold	39
Number of assets held for sale	2		2
Number of properties included in discontinued operations			105
Number of disposed properties previously included in shopping center segment			99
Number of disposed properties previously included in other investments segment			6
Number of properties included in other investments segment		0	0
Other properties deconsolidated for accounting purposes				1