Inventory Impairments and Land Option Contract Abandonments - Valuation Inputs (Details)	12 Months Ended
	Nov. 30, 2020 USD ($) delivery	Nov. 30, 2019 USD ($) delivery	Nov. 30, 2018 USD ($) delivery
Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Average selling price | $	$ 301,600	$ 315,000	$ 291,300
Deliveries per month | delivery	1	1	2
Discount rate	17.00%	17.00%	17.00%
Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Average selling price | $	$ 1,127,100	$ 1,045,400	$ 774,100
Deliveries per month | delivery	4	4	6
Discount rate	18.00%	17.00%	19.00%