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Inventory Impairments and Land Option Contract Abandonments (Narratives) (Details)
 3 Months Ended 6 Months Ended
May 31, 2025
USD ($)
community
May 31, 2024
USD ($)
May 31, 2025
USD ($)
community
May 31, 2024
USD ($)
Nov. 30, 2024
USD ($)
community
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Number of land parcels or communities evaluated for recoverability | community 10   10   8
Carrying value of communities of land parcels evaluated for impairment $ 143,200,000   $ 143,200,000   $ 139,500,000
Inventory impairment charges 0 $ 0 0 $ 0  
Aggregate carrying value of inventory impacted by pretax, noncash inventory impairment charges $ 13,000,000.0   $ 13,000,000.0   $ 32,100,000
Number of communities and various other land parcels impacted by pretax, noncash inventory impairment charges | community 4   4   4
Land Option Contract Abandonment          
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Land option abandonments $ 5,600,000 $ 1,200,000 $ 7,000,000.0 $ 2,500,000