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Commitments and Contingencies (Narrative) (Details) - USD ($)
$ in Thousands
6 Months Ended
Jan. 31, 2020
Oct. 31, 2019
Oct. 31, 2018
Amount outstanding in letters of credit $ 75,500    
Surety Bonds Outstanding 9,600    
Holland Creek Metropolitan District [Member]      
Credit-enhanced bonds issued amount 6,300    
Amount outstanding in letters of credit 6,400    
Red Sky Ranch Metropolitan District [Member]      
Other long-term liabilities $ 2,000 $ 2,000 $ 2,000
Estimated cessation date of capital improvement fee payment obligation Jul. 31, 2031    
Employee Housing Bonds [Member]      
Amount outstanding in letters of credit $ 53,400    
Workers' Compensation and General Liability Related to Construction and Development Activities [Member]      
Amount outstanding in letters of credit $ 22,100