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Acquisitions - Summary of Acquired Shopping Centers (Detail) (USD $)
 12 Months Ended
Dec. 31, 2013
Blackstone [Member]
Dec. 31, 2013
Shopping Centers [Member]
Blackstone [Member]
Dec. 31, 2012
Shopping Centers [Member]
NC [Member]
Raleigh [Member]
Dec. 31, 2012
Shopping Centers [Member]
NC [Member]
Charlotte [Member]
Dec. 31, 2012
Shopping Centers [Member]
MO [Member]
Independence [Member]
Dec. 31, 2012
Shopping Centers [Member]
MO [Member]
St. Louis [Member]
Dec. 31, 2012
Shopping Centers [Member]
AZ [Member]
Tucson [Member]
Dec. 31, 2012
Shopping Centers [Member]
AZ [Member]
Phoenix [Member]
Acquisition One [Member]
Dec. 31, 2012
Shopping Centers [Member]
AZ [Member]
Phoenix [Member]
Acquisition Two [Member]
Dec. 31, 2012
Shopping Centers [Member]
OR [Member]
Portland [Member]
Dec. 31, 2012
Shopping Centers [Member]
IL [Member]
Chicago [Member]
Dec. 31, 2013
Shopping Centers [Member]
FL and GA [Member]
Orlando and Atlanta [Member]
Dec. 31, 2013
Shopping Centers [Member]
Parcels Adjacent to existing shopping centers [Member]
Dec. 31, 2013
Shopping Centers [Member]
FL, GA, and VA [Member]
Tampa, Atlanta, Newport News and Richmond [Member]
Dec. 31, 2013
Shopping Centers [Member]
TX [Member]
Dallas [Member]
Dec. 31, 2013
Shopping Centers [Member]
CA [Member]
Oakland [Member]
Business Acquisition [Line Items]                                
Acquisition date of shopping centers   October 2013 December 2012 December 2012 September 2012 September 2012 August 2012 July 2012 April 2012 April 2012 March 2012 July 2013 June 2013 April 2013 March 2013 February 2013
Gross Purchase Price   $ 1,548,400,000 $ 44,800,000 $ 106,400,000 $ 57,800,000 $ 6,500,000 $ 125,400,000 $ 137,300,000 $ 59,900,000 $ 77,900,000 $ 47,400,000 $ 258,500,000 $ 11,700,000 $ 110,500,000 $ 40,300,000 $ 41,100,000
Face Value of Mortgage Debt Assumed $ 792,900,000 $ 792,900,000       $ 33,600,000 $ 3,400,000 $ 24,400,000 $ 105,400,000 $ 47,200,000 $ 56,600,000    $ 139,400,000