Inventory Impairments and Land Option Contract Abandonments (Narratives) (Details)	3 Months Ended		9 Months Ended
	Aug. 31, 2023 USD ($) community	Aug. 31, 2022 USD ($)	Aug. 31, 2023 USD ($) community	Aug. 31, 2022 USD ($)	Nov. 30, 2022 USD ($) community
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Number of land parcels or communities evaluated for recoverability | community	4		4		5
Carrying value of communities of land parcels evaluated for impairment	$ 66,200,000		$ 66,200,000		$ 118,700,000
Inventory impairment charges	0	$ 2,600,000	0	$ 2,600,000
Aggregate carrying value of inventory impacted by pretax, noncash inventory impairment charges	$ 80,900,000		$ 80,900,000		$ 102,900,000
Number of communities and various other land parcels impacted by pretax, noncash inventory impairment charges | community	6		6		8
Land Option Contract Abandonment
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Land option abandonments	$ 600,000	$ 5,900,000	$ 10,200,000	$ 6,800,000