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Investments in Unconsolidated Joint Ventures (Narratives) (Details) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended
	Aug. 31, 2012	Aug. 31, 2011	Aug. 31, 2012	Aug. 31, 2011	May 31, 2011 South Edge	Feb. 28, 2011 South Edge
Investment Holdings [Line Items]
Loss on loan guaranty	$ 0	$ 0	$ 0	$ 37,330,000	$ 14,600,000	$ 22,800,000
Equity in loss of unconsolidated joint ventures including pretax, noncash impairment charges			$ 0	$ 53,700,000

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- Definition

Loss on loan guaranty.

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No definition available.

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- Definition

Noncash impairment charges included in equity in loss of unconsolidated joint ventures.

+ References

No definition available.

+ Details

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- Details

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