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Commitments and Contingencies (Narratives) (Details) (USD $) | 3 Months Ended |
--- | --- | ---
Feb. 28, 2014 | Feb. 28, 2013 | Nov. 30, 2013
Loss Contingencies [Line Items] |  |  |
Structural warranty provided by the company (in years) | 10 years |  |
Minimum warranty on electrical and other building systems (in years) | 2 years |  |
Maximum warranty on electrical and other building systems (in years) | 5 years |  |
Warranty for other components of a home (in years) | 1 year |  |
Payments | $ (8,711,000) | $ (8,929,000) |
Adjustment to increase warranty liability | 0 | 1,674,000 |
Performance bonds | 427,000,000 |  | 410,800,000
Letters of credit outstanding | 41,700,000 |  | 41,500,000
Total deposits | 55,700,000 |  |
Cash deposits | 55,634,000 |  | 41,565,000
Letters of credit | 100,000 |  | 100,000
Aggregate purchase price of land | 1,090,566,000 |  | 1,151,496,000
Water Intrusion [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Warranty Liability Associated with Water Intrusion | 22,900,000 |  | 28,900,000
Number of Homes Affected by Water Intrusion | 352 |  | 710
Number of Affected Homes on which Repairs Were Resolved | 371 |  |
Accumulated number of affected homes on which repairs were resolved | 1,125 |  |
Payments | (6,000,000) | (5,400,000) |
Accumulated Number of Affected Homes | 1,477 |  |
Payments made as repair costs for homes with Water Intrusion | 42,700,000 |  |
Estimated repair costs for homes with Water Intrusion | 65,600,000 |  |
Number of Affected Attached Home Communities | 2 |  |
Number Of Affected Homes, Period Increase (Decrease) | 13 |  |
Product Liability Contingency, Loss Exposure Not Accrued, Best Estimate | $ 6,000,000 |  |

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