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Inventory Impairments and Land Option Contract Abandonments (Narratives) (Details) | 3 Months Ended |
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Feb. 29, 2020 USD ($) property lot delivery Rate | Feb. 28, 2019 USD ($) property delivery Rate | Nov. 30, 2019 USD ($) property
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |  |  |
Number of land parcels or communities evaluated for recoverability | property |  | 13 | 18 |
Carrying value of communities or land parcels evaluated for impairment |  | $ 116,300,000 | $ 96,200,000 |
Inventory impairment charges |  | 5,100,000 | 3,200,000 |
Aggregate carrying value of inventory impacted by pretax, noncash inventory impairment charges |  | $ 106,500,000 |  | $ 115,600,000
Number of communities and various other land parcels impacted by pretax, noncash inventory impairment charges |  | 18 |  | 19
Minimum [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |  |  |
Average selling price | [1] | $ 302,700 | $ 1,045,400 |
Deliveries per month | delivery | [1] | 1 | 1 |
Minimum [Member] | Measurement Input, Discount Rate [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |  |  |
Discount Rate, Percent | Rate | [1] | 17.00% | 17.00% |
Maximum [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |  |  |
Average selling price | [1] | $ 915,500 | $ 1,045,400 |
Deliveries per month | delivery | [1] | 4 | 1 |
Maximum [Member] | Measurement Input, Discount Rate [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |  |  |
Discount Rate, Percent | Rate | [1] | 18.00% | 17.00% |
Land Option Contract Abandonment [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |  |  |
Land option contract abandonment charges |  | $ 600,000 | $ 400,000 |
[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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- Definition Number of communities and various other land parcels impacted by pretax, noncash inventory impairment charges. + References No definition available. + Details
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- Definition The charge against earnings in the period to reduce the carrying amount of real property to fair value. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230 + Details
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