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Acquisitions - Summary of Acquired Shopping Centers (Detail) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Business Acquisition [Line Items]
Face Value of Mortgage Debt Assumed		$ 246,200,000
Orlando, FL and Atlanta, GA [Member]
Business Acquisition [Line Items]
Acquisition date of shopping centers	July 2013
Gross Purchase Price	258,500,000
Face Value of Mortgage Debt Assumed	139,400,000
Parcels Adjacent to Existing Shopping Centers [Member]
Business Acquisition [Line Items]
Acquisition date of shopping centers	June 2013
Gross Purchase Price	11,700,000
Face Value of Mortgage Debt Assumed
Tampa, FL, Atlanta, GA, Newport News, VA and Richmond, VA (2 assets) [Member]
Business Acquisition [Line Items]
Acquisition date of shopping centers	April 2013
Gross Purchase Price	110,500,000
Face Value of Mortgage Debt Assumed
Dallas, TX [Member]
Business Acquisition [Line Items]
Acquisition date of shopping centers	March 2013
Gross Purchase Price	40,300,000
Face Value of Mortgage Debt Assumed
Oakland, CA [Member]
Business Acquisition [Line Items]
Acquisition date of shopping centers	February 2013
Gross Purchase Price	41,100,000
Face Value of Mortgage Debt Assumed