Unconsolidated Entities - Other Joint Ventures, Investment in and Advances to by Region (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended	3 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Jun. 30, 2012 Other joint ventures [Member]
Schedule of Equity Method Investments [Line Items]
Return of capital	$ 237,784	$ 114,375	$ 95,000

Cash dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporations that are returns of capital. Excludes dividends or distributions from equity method investments classified as operating activities.

No definition available.

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