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Inventory Impairments and Land Option Contract Abandonments (Narrative) (Details)
 12 Months Ended
Nov. 30, 2024
USD ($)
community
property
Nov. 30, 2023
USD ($)
community
property
Nov. 30, 2022
USD ($)
property
community
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Number of land parcels or communities evaluated for recoverability | property 8 5 5
Carrying value of communities of land parcels evaluated for impairment $ 139,500,000 $ 89,300,000 $ 118,700,000
Impairment of real estate 0 0 $ 24,100,000
Number of land parcels or communities associated with non cash inventory impairment charges | community     4
Aggregate carrying value of inventory impacted by pretax, noncash inventory impairment charges $ 32,100,000 $ 73,900,000  
Number of communities and various other land parcels impacted by pretax, noncash inventory impairment charges | community 4 5  
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 $ 4,600,000 $ 11,400,000 $ 13,200,000
Estimate of Fair Value Measurement      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Fair value     $ 41,300,000