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Commitments and Contingencies - Additional Information (Detail)
$ in Millions
 12 Months Ended
Dec. 31, 2015
USD ($)
Contingencies And Commitments [Line Items]  
Agreements entered into with general contractors for the construction or redevelopment of shopping centers $ 24.8
Outstanding letters of credit 30.2
Affiliate debt guarantee $ 4.7
Long-term ground leases expiration period various dates through 2070
Minimum [Member]  
Contingencies And Commitments [Line Items]  
Period space in shopping centers leased 1 month
Maximum [Member]  
Contingencies And Commitments [Line Items]  
Period space in shopping centers leased 30 years