Financial Instruments and Fair Value Disclosures - (Unobservable Inputs Used in Discounted Cash Flow Model to Determine the Fair Value of Communities) (Details) $ / homes in Thousands	Feb. 29, 2020 $ / homes
Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable inputs	0.20
Minimum | Average selling price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable inputs	201,000
Minimum | Absorption rate per quarter (homes)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable inputs	3
Maximum | Average selling price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable inputs	970,000
Maximum | Absorption rate per quarter (homes)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable inputs	15