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Acquisitions - Additional Information (Detail) (USD $)
Share data in Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Acquisition Activity [Line Items]      
Acquisition costs related to assets $ 3,300,000    
Ownership interest acquired cash paid 857,219,000 602,297,000  
Preferred equity and Mezzanine loan repaid 160,123,000 0  
Aggregate gain on change in control of interests 19,900,000 80,000,000  
Revenues from the date of acquisition 62,600,000 25,800,000 10,300,000
Senior Unsecured Notes due May 2023 [Member]
      
Acquisition Activity [Line Items]      
Interest rate of Notes 3.375%    
Notes maturity date May 15, 2023    
Senior Unsecured Notes due January 2021 [Member]
      
Acquisition Activity [Line Items]      
Interest rate of Notes 3.50%    
Notes maturity date Jan. 15, 2021    
Blackstone [Member]
      
Acquisition Activity [Line Items]      
Number of power centers acquired 30    
Total transaction value 1,550,000,000    
Ownership interest acquired cash paid 565,600,000    
Ownership interest of joint venture partner 95.00%    
Debt assumed 792,900,000    
Mortgage debt assumed repaid at closing 139,000,000    
Mortgage debt assumed repaid 256,000,000    
Preferred equity and Mezzanine loan repaid 160,100,000    
Aggregate gain on change in control of interests $ 18,800,000    
Sale of common shares 39.1    
Ownership interest percentage 100.00%