Financial Instruments and Fair Value Disclosures - (Unobservable Inputs Used in Discounted Cash Flow Model to Determine the Fair Value of Communities) (Details)	3 Months Ended
	Feb. 28, 2018 USD ($) community homes $ / homes	Feb. 28, 2017 USD ($)
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Valuation adjustments to inventory	$ 6,900,000	$ 0
Discount rate	20.00%
Number of homes impaired | homes	114
Number of communities impaired | community	1
Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Average selling price | $ / homes	572,000,000
Absorption rate per quarter (homes)	6
Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Carrying value of homesites impaired	$ 17,500,000