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Loans Payable, Senior Notes, and Mortgage Company Loan Facility Mortgage Company Loan Facility (Details Textual 4) - USD ($)
$ in Thousands
1 Months Ended
Mar. 04, 2021
Dec. 31, 2019
Oct. 31, 2021
Oct. 31, 2020
Line of Credit Facility [Line Items]        
Line of Credit Facility, Maximum Borrowing Capacity     $ 2,773,602  
Mortgage company loan facility     147,512 $ 148,611
Fair value     247,211 231,797
Warehouse Agreement Borrowings [Member]        
Line of Credit Facility [Line Items]        
Line of Credit Facility, Current Borrowing Capacity     75,000  
Line of Credit Facility, Maximum Borrowing Capacity     $ 150,000  
Debt Instrument, Maturity Date   Mar. 04, 2021    
Debt Instrument, Interest Rate, Effective Percentage     2.50%  
Mortgage company loan facility     $ 147,500 148,600
Fair value     245,000 $ 219,400
Aggregate Outstanding Purchase Price Limitations     $ 0  
Warehouse Agreement Borrowings [Member] | London Interbank Offered Rate (LIBOR) [Member]        
Line of Credit Facility [Line Items]        
Interest Rate on Loan Commitments in Addition to Libor 1.75% 1.90%    
Warehouse Agreement Borrowings [Member] | Interest Rate Floor | London Interbank Offered Rate (LIBOR) [Member]        
Line of Credit Facility [Line Items]        
Interest Rate on Loan Commitments in Addition to Libor 0.75%