Financial Instruments and Fair Value Disclosures - (Communities with Indicators for Impairment) (Details)	3 Months Ended
	Feb. 29, 2020 USD ($) community	Feb. 28, 2019 USD ($) community
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]
Number of Communities with potential indicator of impairment | community	33	54
Number of communities with valuation adjustments | community	6	0
Valuation adjustments | $	$ 19,944,000	$ 0
Level 3
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]
Fair value of communities with valuation adjustments | $	$ 45,123,000	$ 0