Financial Instruments and Fair Value Disclosures - (Communities with Indicators for Impairment) (Details)	6 Months Ended
	May 31, 2020 USD ($) community	May 31, 2019 USD ($) community
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]
Number of Communities with potential indicator of impairment | community	41	52
Number of communities with valuation adjustments | community	9	0
Valuation adjustments | $	$ 32,072,000	$ 0
Level 3
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]
Fair value of communities with valuation adjustments | $	$ 69,137,000	$ 0