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Commitments and Contingencies (Narratives) (Details) (USD $) | 3 Months Ended | 9 Months Ended | 12 Months Ended
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Aug. 31, 2014 community Home | Aug. 31, 2013 | Aug. 31, 2014 Home community | Aug. 31, 2013 | Nov. 30, 2013 Home
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 | $ (10,633,000) |  | $ (12,654,000) |  | $ (30,795,000) |  | $ (30,867,000) |  |
Adjustment to increase warranty liability | 7,546,000 | [1] | 5,931,000 | [1] | 12,155,000 | [1] | 23,478,000 | [1] |
Performance bonds | 500,700,000 |  |  |  | 500,700,000 |  |  |  | 410,800,000
Letters of credit outstanding | 31,900,000 |  |  |  | 31,900,000 |  |  |  | 41,500,000
Total deposits | 40,600,000 |  |  |  | 40,600,000 |  |  |  |
Cash deposits | 40,465,000 |  |  |  | 40,465,000 |  |  |  | 41,565,000
Letters of credit | 100,000 |  |  |  | 100,000 |  |  |  | 100,000
Aggregate purchase price of land | 904,129,000 |  |  |  | 904,129,000 |  |  |  | 1,151,496,000
Water Intrusion [Member] |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Loss Contingency, Receivable | 12,794,000 |  | 0 |  | 12,794,000 |  | 0 |  |
Warranty Liability Associated with Water Intrusion | 14,700,000 |  |  |  | 14,700,000 |  |  |  | 28,900,000
Number of Homes Affected by Water Intrusion | 363 |  |  |  | 363 |  |  |  | 710
Additional Number of Affected Homes Associated with Repair Costs |  |  |  |  | 136 |  |  |  |
Number of Affected Homes on which Repairs Were Resolved |  |  |  |  | 483 |  |  |  |
Accumulated number of affected homes on which repairs were resolved | 1,237 |  |  |  | 1,237 |  |  |  |
Payments | (7,200,000) |  | (10,000,000) |  | (21,300,000) |  | (21,400,000) |  |
Accumulated Number of Affected Homes | 1,600 |  |  |  | 1,600 |  |  |  |
Payments made as repair costs for homes with Water Intrusion | (58,000,000) |  |  |  | (58,000,000) |  |  |  |
Estimated repair costs for homes with Water Intrusion | 72,700,000 |  |  |  | 72,700,000 |  |  |  |
Number of Affected Attached Home Communities | 3 |  |  |  | 3 |  |  |  |
Insurance Recoveries | 500,000 |  |  |  |  |  |  |  |
Product Liability Contingency, Third Party Recovery |  |  |  |  | 27,000,000 |  |  |  |
Product Liability Contingency, Third Party Recovery Included In Warranty Liability |  |  |  |  | 14,700,000 |  |  |  | 19,400,000
Increase (Decrease) in Insurance Settlements Receivable | 7,200,000 |  |  |  |  |  |  |  |
Product Liability Contingency, Loss Exposure Not Accrued, Best Estimate |  |  |  |  | $ 6,000,000 |  |  |  |
Palm River [Member] | Water Intrusion [Member] |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Number of Affected Attached Home Communities | 1 |  |  |  | 1 |  |  |  |
Attached Home Communities [Member] | Water Intrusion [Member] |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Percentage of Total Estimated Repair Costs | 64.00% |  |  |  | 64.00% |  |  |  |
[1] | As discussed below, adjustments for the three months and nine months ended August 31, 2014 were primarily comprised of a reclassification of estimated minimum probable recoveries to receivables and a reclassification to establish a separate accrual for a water intrusion-related inquiry. These items had no impact on our consolidated statements of operations. Adjustments for the three months and nine months ended August 31, 2013 reflected net warranty charges associated with water intrusion-related issues in central and southwest Florida.

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