Legal Matters (Details Textual) (USD $) In Millions, unless otherwise specified	9 Months Ended
Aug. 31, 2011
Loss Contingencies [Line Items]
Amount deposited in escrow account	$ 21.4
South Edge LLC Litigation [Member]
Loss Contingencies [Line Items]
Aggregate Principal Amount Of Loan Made To South Edge	585.0
Outstanding principal amount of loan In the petition alleged	327.9
Number of days by which effective date of plan is to occur upon confirmation	30 days
Approximate amount paid in between, minimum	214
Approximate amount paid in between, maximum	225
Amount deposited in escrow account	21.0
Lenders Ownership level that can assert claims against the company that do not consent to the plan	less than 8%
South Edge LLC Litigation [Member] \| Maximum [Member]
Loss Contingencies [Line Items]
Loss Contingency Estimate Of Possible Loss Including Fees, Expenses, Charges And Claims	240.0
Percentage of the company share of land owned by South Edge that would be acquired	68.00%
Amount of damage awarded to the claimant	36.8
South Edge LLC Litigation [Member] \| Minimum [Member]
Loss Contingencies [Line Items]
Loss Contingency Estimate Of Possible Loss Including Fees, Expenses, Charges And Claims	226.4
Percentage of the company share of land owned by South Edge that would be acquired	65.00%
Amount of damage awarded to the claimant	$ 25.5

Aggregate principal amount of loan made to unconsolidated joint venture.

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Lenders Ownership level that can assert claims against the company that do not consent to the plan .

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Number of days by which effective date of plan is to occur upon confirmation.

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Percentage of company share of land owned by unconsolidated joint venture that would be acquired.

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- Definition

The designation of funds furnished by a borrower to a lender to assure future payments of the borrower's real estate taxes and insurance obligations with respect to a mortgaged property. Escrow deposits may be made for a variety of other purposes such as earnest money and contingent payments. This element excludes replacement reserves which are an escrow separately provided for within the US GAAP taxonomy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.10)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The carrying amount as of the balance sheet date of the combined total of loss contingency liabilities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 9, 10, 11, 12
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Section 50
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- Definition

The value (monetary amount) of the award the plaintiff seeks in the legal matter.

+ References

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- Definition

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

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- Definition

The estimated maximum amount of possible loss from the contingency.

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The estimated minimum amount of possible loss from the contingency.

+ References

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