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Inventory Impairments and Land Option Contract Abandonments (Narrative) (Details) | 12 Months Ended
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Nov. 30, 2023 USD ($) community property | Nov. 30, 2022 USD ($) property community | Nov. 30, 2021 USD ($) community property
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Number of land parcels or communities evaluated for recoverability | property | 5 | 5 | 1
Carrying value of communities of land parcels evaluated for impairment | $ 89,300,000 | $ 118,700,000 | $ 29,900,000
Impairment of real estate | 0 | $ 24,100,000 | $ 9,900,000
Number of land parcels or communities associated with non cash inventory impairment charges | community |  | 4 | 2
Aggregate carrying value of inventory impacted by pretax, noncash inventory impairment charges | $ 73,900,000 | $ 102,900,000 |
Number of communities and various other land parcels impacted by pretax, noncash inventory impairment charges | community | 5 | 8 |
Expected realization period of inventory maximum | 5 years |  |
Minimum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Expected realization period of inventory maximum | 1 year |  |
Maximum |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Expected realization period of inventory maximum | 10 years |  |
Land Option Contract Abandonment |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Loss on contract termination | $ 11,400,000 | $ 13,200,000 | $ 2,100,000
Estimate of Fair Value Measurement |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Fair value |  | $ 41,300,000 | $ 18,000,000

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