Investments in Unconsolidated Joint Ventures (Parenthetical) (Detail) (Voyager Investments, Arizona)	Jun. 30, 2011
Voyager Investments | Arizona
Schedule of Equity Method Investments [Line Items]
Economic Interest	50.00%	[1],[2]
Interest in the utility plant servicing the Property included in Other Investments, percentage	25.00%

[1] The percentages shown approximate the Company's economic interest as of June 30, 2011. The Company's legal ownership interest may differ.

[2] Voyager joint venture primarily consists of a 50% interest in Voyager RV Resort and a 25% interest in the utility plant servicing the Property.