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Inventory Impairments and Land Option Contract Abandonments (Details) | 12 Months Ended
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Nov. 30, 2019 USD ($) property delivery community | Nov. 30, 2018 USD ($) property delivery community | Nov. 30, 2017 USD ($) property delivery
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |  |  |
Fair Value Inputs, Discount Rate (Deprecated 2018-01-31) | [1] | 17.00% |  |
Impairment of Real Estate |  | $ 14,000,000.0 | $ 26,100,000 | $ 20,600,000
Acquisition Costs Related To Land Option Contracts And Other Similar Contracts |  | 32,800,000 | 46,900,000 |
Carrying Value of Communities of Land Parcels Evaluated for Impairment |  | $ 326,300,000 | $ 356,100,000 | $ 456,900,000
Number of land parcels or communities associated with non cash inventory impairment charges | property |  | 8 | 13 | 10
Number of land parcels or communities evaluated for recoverability | property |  | 40 | 57 | 51
Aggregate carrying value of inventory impacted by pretax, noncash inventory impairment charges |  | $ 115,600,000 | $ 156,100,000 |
Number of communities and various other land parcels impacted by pretax, noncash inventory impairment charges | community |  | 19 | 22 |
Expected realization period of inventory maximum |  | 5 years |  |
Estimate of Fair Value Measurement |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |  |  |
Assets, Fair Value Disclosure |  | $ 27,100,000 | $ 44,100,000 | $ 38,400,000
Minimum |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |  |  |
Fair Value Estimate Input at Average Selling Price | [1] | $ 315,000 | $ 291,300 | $ 207,100
Fair Value Estimate Input at Sales for Period | delivery | [1] | 1 | 2 | 1
Fair Value Inputs, Discount Rate (Deprecated 2018-01-31) | [1] |  | 17.00% | 17.00%
Expected realization period of inventory maximum |  | 1 year |  |
Maximum |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |  |  |
Fair Value Estimate Input at Average Selling Price | [1] | $ 1,045,400 | $ 774,100 | $ 1,576,500
Fair Value Estimate Input at Sales for Period | delivery | [1] | 4 | 6 | 4
Fair Value Inputs, Discount Rate (Deprecated 2018-01-31) | [1] |  | 19.00% | 18.00%
Expected realization period of inventory maximum |  | 10 years |  |
Land Option Contract Abandonment [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |  |  |
Loss on Contract Termination |  | $ 3,300,000 | $ 2,900,000 | $ 4,600,000
[1] | The ranges of inputs used in each period primarily reflect differences between the housing markets where each impacted community is located, rather than fluctuations in prevailing market conditions.

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