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Inventory Impairments and Land Option Contract Abandonments (Narratives) (Details) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Aug. 31, 2015 USD ($) lot delivery Rate | Aug. 31, 2014 USD ($) lot | Aug. 31, 2015 USD ($) property lot delivery Rate | Aug. 31, 2014 USD ($) property lot | Nov. 30, 2014 USD ($) property
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |
Acquisition Costs Related To Land Option Contracts And Other Similar Contracts | $ 60,000,000 |  | $ 60,000,000 |  | $ 48,000,000
Fair Value Estimate Input, Delivery For Period | delivery | 4 |  | 4 |  |
Fair Value Inputs, Discount Rate | Rate | 20.00% |  | 20.00% |  |
Number of land parcels or communities evaluated for recoverability | property |  |  | 29 | 25 |
Carrying Value of Communities or Land Parcels Evaluated for Impairment | $ 232,800,000 | $ 207,400,000 | $ 232,800,000 | $ 207,400,000 |
Asset Impairment Charges | 3,173,000 | $ 3,408,000 | 3,173,000 | $ 3,408,000 | 37,600,000
Fair Value Estimate Input at Average Selling Price | 178,100 |  | 178,100 |  |
Aggregate carrying value of inventory impacted by pretax, noncash inventory impairment charges | $ 248,300,000 |  | $ 248,300,000 |  | $ 266,600,000
Number of communities and various other land parcels impacted by pretax, noncash inventory impairment charges | 25 |  | 25 |  | 33
Land Option Contract Abandonment Lots Associated with Projects Less Than $100,000 | lot | 0 | 1,651 | 0 | 7,018 |
Land Option Contract Abandonment Lots | lot | 740 | 624 | 1,166 | 1,306 |
Maximum [Member] |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |
Acquisition Costs Related To Land Option Contracts And Other Similar Contracts | $ 100,000 |  | $ 100,000 |  |
Land Option Contract Abandonment [Member] |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |
Payments to Acquire Land | (359,000) | $ (1,013,000) | (1,343,000) | $ (1,803,000) |
Southeast [Member] |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |
Asset Impairment Charges | 3,173,000 | 3,408,000 | 3,173,000 | 3,408,000 |
Southeast [Member] | Land Option Contract Abandonment [Member] |  |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |
Payments to Acquire Land | $ 0 | $ 0 | $ (984,000) | $ (254,000) |

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