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Inventory Impairments and Land Option Contract Abandonments (Details) | 12 Months Ended
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Nov. 30, 2016 USD ($) lot community delivery property | Nov. 30, 2015 USD ($) lot community delivery property | Nov. 30, 2014 USD ($) lot delivery property
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Impairment of Real Estate |  | $ 49,580,000 | $ 8,030,000 | $ 37,628,000
Acquisition Costs Related To Land Option Contracts And Other Similar Contracts |  | 56,000,000 | 65,600,000 |
Carrying Value of Communities of Land Parcels Evaluated for Impairment |  | $ 423,100,000 | $ 286,300,000 | $ 266,900,000
Number of land parcels or communities associated with non cash inventory impairment charges | property |  | 30 | 4 | 8
Number of land parcels or communities evaluated for recoverability | property |  | 68 | 35 | 32
Aggregate carrying value of inventory impacted by pretax, noncash inventory impairment charges |  | $ 215,300,000 | $ 254,200,000 |
Number of communities and various other land parcels impacted by pretax, noncash inventory impairment charges | community |  | 28 | 28 |
Number of Lots on which abandonment charges are recognized | lot |  | 744 | 1,166 | 1,306
Remaining useful life in addition to specified useful lives |  | 1 year |  |
Specified period of remaining useful lives |  | 10 years |  |
Expected realization period of inventory maximum |  | 5 years |  |
Land Held for Sale [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Impairment of Real Estate |  | $ 36,700,000 |  |
Land Held for Future Development [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Impairment of Real Estate |  | 12,900,000 | $ 11,000,000 |
Land [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Impairment of Real Estate |  |  | $ 26,600,000 |
Number of land parcels or communities associated with non cash inventory impairment charges | property |  |  | 2 |
Communities [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Number of land parcels or communities associated with non cash inventory impairment charges | property |  |  | 6 |
Minimum |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Fair Value Estimate Input at Average Selling Price | [1] | $ 216,200 | $ 178,100 | $ 216,100
Fair Value Estimate Input at Sales for Period | delivery | [1] | 1 | 2 | 1
Fair Value Inputs, Discount Rate | [1] | 17.00% | 17.00% | 17.00%
Maximum |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Fair Value Estimate Input at Average Selling Price | [1] | $ 977,400 | $ 509,400 | $ 316,800
Fair Value Estimate Input at Sales for Period | delivery | [1] | 4 | 4 | 4
Fair Value Inputs, Discount Rate | [1] | 20.00% | 20.00% | 19.00%
Estimate of Fair Value Measurement [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Assets, Fair Value Disclosure |  | $ 39,500,000 | $ 12,000,000 | $ 30,600,000
Land Option Contract Abandonment [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Loss on Contract Termination |  | 3,232,000 | 1,561,000 | 1,803,000
West Coast [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Impairment of Real Estate |  | 8,209,000 | 645,000 | 27,285,000
West Coast [Member] | Land Option Contract Abandonment [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Loss on Contract Termination |  | 769,000 | 352,000 | 554,000
Southeast [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Impairment of Real Estate |  | 27,547,000 | 4,132,000 | 3,951,000
Southeast [Member] | Land Option Contract Abandonment [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Loss on Contract Termination |  | 1,750,000 | $ 984,000 | $ 254,000
Metro Washington, D.C. [Member] | Southeast [Member] | Land Option Contract Abandonment [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Loss on Contract Termination |  | $ 1,400,000 |  |
[1] | The ranges of inputs used in each period primarily reflect differences between the housing markets where each of the impacted communities are located, rather than fluctuations in prevailing market conditions.

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