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Consolidation of Joint Ventures and Long-Term Debt - Additional Information (Detail) (USD $)
6 Months Ended
Jun. 30, 2012
Jun. 25, 2011
Dec. 31, 2011
Variable Interest Entity [Line Items]      
Carrying amounts of assets of the consolidated joint ventures (JVs) $ 177,032,000   $ 177,226,000
Carrying amounts of liabilities of the consolidated joint ventures (JVs) 77,222,000   76,249,000
Loans assumed $ 6,450,000 $ 20,476,000  
Debt instrument fixed interest rate, minimum 4.50%    
Debt instrument fixed interest rate, maximum 5.30%    
Minimum
     
Variable Interest Entity [Line Items]      
Basis points added to LIBOR to determine variable interest rate 1.95%    
Debt instrument maturity 2012-07    
Maximum
     
Variable Interest Entity [Line Items]      
Basis points added to LIBOR to determine variable interest rate 2.50%    
Debt instrument maturity 2015-01    
Shopping Center Loans
     
Variable Interest Entity [Line Items]      
Debt instrument fixed interest rate, minimum 5.10%    
Debt instrument fixed interest rate, maximum 7.50%    
Shopping Center Loans | Minimum
     
Variable Interest Entity [Line Items]      
Debt instrument maturity 2013-09    
Shopping Center Loans | Maximum
     
Variable Interest Entity [Line Items]      
Debt instrument maturity 2027-01