Inventory Impairments and Land Option Contract Abandonments (Details)		12 Months Ended
		Nov. 30, 2019 USD ($) property delivery community	Nov. 30, 2018 USD ($) property delivery community	Nov. 30, 2017 USD ($) property delivery
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair Value Inputs, Discount Rate (Deprecated 2018-01-31)	[1]	17.00%
Impairment of Real Estate		$ 14,000,000.0	$ 26,100,000	$ 20,600,000
Acquisition Costs Related To Land Option Contracts And Other Similar Contracts		32,800,000	46,900,000
Carrying Value of Communities of Land Parcels Evaluated for Impairment		$ 326,300,000	$ 356,100,000	$ 456,900,000
Number of land parcels or communities associated with non cash inventory impairment charges | property		8	13	10
Number of land parcels or communities evaluated for recoverability | property		40	57	51
Aggregate carrying value of inventory impacted by pretax, noncash inventory impairment charges		$ 115,600,000	$ 156,100,000
Number of communities and various other land parcels impacted by pretax, noncash inventory impairment charges | community		19	22
Expected realization period of inventory maximum		5 years
Estimate of Fair Value Measurement
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Assets, Fair Value Disclosure		$ 27,100,000	$ 44,100,000	$ 38,400,000
Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair Value Estimate Input at Average Selling Price	[1]	$ 315,000	$ 291,300	$ 207,100
Fair Value Estimate Input at Sales for Period | delivery	[1]	1	2	1
Fair Value Inputs, Discount Rate (Deprecated 2018-01-31)	[1]		17.00%	17.00%
Expected realization period of inventory maximum		1 year
Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair Value Estimate Input at Average Selling Price	[1]	$ 1,045,400	$ 774,100	$ 1,576,500
Fair Value Estimate Input at Sales for Period | delivery	[1]	4	6	4
Fair Value Inputs, Discount Rate (Deprecated 2018-01-31)	[1]		19.00%	18.00%
Expected realization period of inventory maximum		10 years
Land Option Contract Abandonment [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Loss on Contract Termination		$ 3,300,000	$ 2,900,000	$ 4,600,000

[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.