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Accrued Expenses (Details 1) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended 42 Months Ended
Oct. 31, 2021
Apr. 30, 2020
Oct. 31, 2021
Oct. 31, 2020
Oct. 31, 2019
Apr. 30, 2020
Change in warranty accruals for home closed in prior periods [Line Items]            
Loss Contingency, Receivable $ 16,773   $ 16,773 $ 79,269    
Changes in the warranty accrual            
Balance, beginning of year     157,351 201,886 $ 258,831  
Additions - homes closed during the year     42,316 36,103 35,475  
Addition - liabilities acquired     100 190 855  
Charges incurred     (55,655) (63,139) (99,298)  
Balance, end of year 145,062   145,062 157,351 201,886  
Water intrusion related [Member]            
Changes in the warranty accrual            
Balance, beginning of year     79,500      
Balance, end of year 54,700   54,700 79,500    
Other Assets [Member] | Water intrusion related [Member]            
Change in warranty accruals for home closed in prior periods [Line Items]            
Loss Contingency, Receivable 5,800   5,800 68,400    
Changes in the warranty accrual            
Product Liability Contingency, Third Party Recovery           $ 152,600
Reclass from self insurance accrual            
Changes in the warranty accrual            
Standard and Extended Product Warranty Accrual, Period Increase (Decrease)     3,618 0 0  
Warranty Obligations [Member]            
Changes in the warranty accrual            
Increase (decrease) to accruals for homes closed in prior periods     (11,823) (24,400) 0  
Warranty Obligations [Member] | Other Assets [Member] | Water intrusion related [Member]            
Changes in the warranty accrual            
Product Liability Contingency, Third Party Recovery $ 11,800 $ 24,400        
Warranty change, homes closed in prior period, other [Member]            
Changes in the warranty accrual            
Increase (decrease) to accruals for homes closed in prior periods     $ 9,155 $ 6,711 $ 6,023