Unconsolidated Entities - Other Joint Ventures, Investment in and Advances to by Region (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated entities	$ 4,210,305	$ 2,195,782
Other joint ventures [Member]
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated entities	174,515	182,702
Other joint ventures [Member] | Americas [Member]
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated entities	97,253	106,655
Other joint ventures [Member] | Europe [Member]
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated entities	50,166	48,503
Other joint ventures [Member] | Asia [Member]
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated entities	$ 27,096	$ 27,544