Inventory Impairments and Land Option Contract Abandonments (Narratives) (Details)		3 Months Ended
		Feb. 29, 2020 USD ($) property lot delivery Rate	Feb. 28, 2019 USD ($) property delivery Rate	Nov. 30, 2019 USD ($) property
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Number of land parcels or communities evaluated for recoverability | property		13	18
Carrying value of communities or land parcels evaluated for impairment		$ 116,300,000	$ 96,200,000
Inventory impairment charges		5,100,000	3,200,000
Aggregate carrying value of inventory impacted by pretax, noncash inventory impairment charges		$ 106,500,000		$ 115,600,000
Number of communities and various other land parcels impacted by pretax, noncash inventory impairment charges		18		19
Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Average selling price	[1]	$ 302,700	$ 1,045,400
Deliveries per month | delivery	[1]	1	1
Minimum [Member] | Measurement Input, Discount Rate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Discount Rate, Percent | Rate	[1]	17.00%	17.00%
Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Average selling price	[1]	$ 915,500	$ 1,045,400
Deliveries per month | delivery	[1]	4	1
Maximum [Member] | Measurement Input, Discount Rate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Discount Rate, Percent | Rate	[1]	18.00%	17.00%
Land Option Contract Abandonment [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Land option contract abandonment charges		$ 600,000	$ 400,000

[1] The ranges of inputs used in each period primarily reflect differences between the housing markets where each impacted community is located, rather than fluctuations in prevailing market conditions.