Fair Value Disclosures (Level 4 Inv Impair inputs) (Details 2) - Operating communities [Member] $ in Thousands	3 Months Ended
	Oct. 31, 2021 USD ($) Homes_sold	Jul. 31, 2021 USD ($) Homes_sold	Apr. 30, 2021 USD ($) Homes_sold	Jan. 31, 2021 USD ($) Homes_sold	Oct. 31, 2020 USD ($)	Jul. 31, 2020 USD ($)	Apr. 30, 2020 USD ($)	Jan. 31, 2020 USD ($)
Minimum [Member]
Fair value inputs, assets, quantitative information [Line Items]
Average selling price				$ 2,003			$ 613
Sales Pace				2			9
Fair Value Input, Discount Rate				14.30%			14.30%
Maximum [Member]
Fair value inputs, assets, quantitative information [Line Items]
Average selling price				$ 2,003			$ 789
Sales Pace				2			9
Fair Value Input, Discount Rate				14.30%			14.30%