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Commitments and Contingencies (Details Textual) (USD $) | 3 Months Ended |  |
--- | --- | --- | ---
Feb. 29, 2012 Home Lawsuit | Feb. 28, 2011 | Nov. 30, 2011 Home | Nov. 30, 2010
Commitments and Contingencies (Textual) [Abstract] |  |  |  |
Structural warranty provided by the company | 10 years |  |  |
Maximum warranty on electrical and other building systems | 5 years |  |  |
Minimum warranty on electrical and other building systems | 2 years |  |  |
Warranty for other components of a home | 1 year |  |  |
Company's warranty liability | $ 64,607,000 | $ 87,061,000 | $ 67,693,000 | $ 93,988,000
Warranty liability associated with defective drywall | 3,900,000 |  | 4,800,000 |
Number of homes containing or suspected of containing defective drywall | 73 |  | 87 |
Number of affected homes on which repairs were resolved. | 15 |  |  |
Additional Number of affected homes associated with repair costs | 1 |  |  |
Payments made for the repair of homes containing defective drywall | 1,300,000 | 5,400,000 |  |
Estimated additional charges for homes containing defective drywall | 400,000 | 3,700,000 |  |
Estimated repair costs for homes containing defective drywall. | 45,700,000 |  |  |
Accumulated number of homes identified affected associated with overall warranty liability. | 468 |  |  |
Accumulated Number of affected homes on which repairs were resolved. | 395 |  |  |
Payments made as repair costs for homes containing defective drywall | 41,800,000 |  |  |
Number of lawsuits in which company is a defendant | 11 |  |  |
Company's estimated liabilities for construction defect | 92,100,000 |  | 94,900,000 |
Expenses associated with self-insurance | 2,300,000 | 2,300,000 |  |
Performance bonds | 330,000,000 |  | 361,600,000 |
Letters of Credit Outstanding, Amount | 61,800,000 |  | 63,800,000 |
Cash deposits | 20,700,000 |  | 20,900,000 |
Letters of credit | 200,000 |  | 1,700,000 |
Total deposits | 20,900,000 |  |  |
Aggregate purchase price of land | $ 597,000,000 |  |  |

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