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Investments in and Advances to Joint Ventures - Condensed Combined Financial Information of Company's Unconsolidated Joint Venture Investments (Parenthetical) (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Schedule of Equity Method Investments [Line Items]    
Amounts receivable from joint ventures $ 35,900 $ 34,300
Unconsolidated Joint Ventures [Member]
    
Schedule of Equity Method Investments [Line Items]    
Cash and restricted cash 355,283 467,200
Amounts receivable from joint ventures 35,900 34,300
Sonae Sierra Brasil BV SARL [Member] | Unconsolidated Joint Ventures [Member]
    
Schedule of Equity Method Investments [Line Items]    
Cash and restricted cash $ 230,800 $ 347,900