Inventory Impairments and Land Option Contract Abandonments (Narrative) (Details)	12 Months Ended
	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