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Commitments and Contingencies (Narratives) (Details) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Aug. 31, 2015 USD ($) Home | Aug. 31, 2014 USD ($) community | Aug. 31, 2015 USD ($) Home | Aug. 31, 2014 USD ($) community | Nov. 30, 2014 USD ($) Home
Loss Contingencies [Line Items] |  |  |  |  |  |
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 |  | $ (5,285,000) | $ (10,633,000) | $ (19,927,000) | $ (30,795,000) |
Adjustment to increase warranty liability | [1] | 1,130,000 | 7,546,000 | 8,164,000 | 12,155,000 |
Performance bonds |  | 542,900,000 |  | 542,900,000 |  | $ 541,600,000
Letters of credit outstanding |  | 26,400,000 |  | 26,400,000 |  | 26,700,000
Cash deposits |  | 42,771,000 |  | 42,771,000 |  | 33,059,000
Aggregate purchase price of land |  | 941,596,000 |  | $ 941,596,000 |  | 958,470,000
Warranty for Other Components of Home |  |  |  | 1 year |  |
Damages from Product Defects [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Structural warranty provided by the company (in years) |  |  |  | 10 years |  |
Water Intrusion [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Loss Contingency, Receivable |  | 8,164,000 | 12,794,000 | $ 8,164,000 | 12,794,000 |
Warranty Liability Associated with Water Intrusion |  | $ 1,300,000 |  | $ 1,300,000 |  | $ 9,400,000
Number of Homes Affected by Water Intrusion | Home |  | 52 |  | 52 |  | 324
Additional Number of Affected Homes Associated with Repair Costs | Home |  |  |  | 74 |  |
Number of Affected Homes on which Repairs Were Resolved | Home |  |  |  | 346 |  |
Payments |  | $ (1,100,000) | $ (7,200,000) | $ (8,600,000) | (21,300,000) |
Payments made as repair costs for homes with Water Intrusion |  | (71,900,000) |  | (71,900,000) |  |
Estimated repair costs for homes with Water Intrusion |  | $ 73,200,000 |  | 73,200,000 |  |
Insurance Recoveries |  |  |  | 5,000,000 | $ 500,000 |
Product Liability Contingency, Third Party Recovery |  |  |  | 22,600,000 |  | $ 26,600,000
Product Liability Contingency, Third Party Recovery Included In Warranty Liability |  |  |  | $ 1,300,000 |  |
Number of Affected Attached Home Communities | community |  |  | 1 |  | 1 |
Warranty Obligations [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Structural warranty provided by the company (in years) |  |  |  | 10 years |  |
Minimum [Member] | Florida Attorney General [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Product Liability Contingency, Loss Exposure Not Accrued, Best Estimate |  |  |  | $ 0 |  |
Minimum [Member] | Water Intrusion [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Product Liability Contingency, Loss Exposure Not Accrued, Best Estimate |  |  |  | 0 |  |
Maximum [Member] | Florida Attorney General [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Product Liability Contingency, Loss Exposure Not Accrued, Best Estimate |  |  |  | 5,000,000 |  |
Maximum [Member] | Water Intrusion [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Product Liability Contingency, Loss Exposure Not Accrued, Best Estimate |  |  |  | $ 3,000,000 |  |
[1] | As discussed below, adjustments for the three months and nine months ended August 31, 2015 and 2014 were primarily comprised of the reclassification of estimated minimum probable recoveries to receivables. Adjustments for the nine months ended August 31, 2014 also included a reclassification of estimated minimum probable recoveries to establish a separate accrual for a water intrusion-related inquiry.

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