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Investments in Unconsolidated Entities (Details 2)
$ in Thousands
Jan. 31, 2021
USD ($)
joint_ventures
Schedule of Equity Method Investments [Line Items]  
Number of joint ventures with loan commitments | joint_ventures 30
Line of Credit Facility, Maximum Borrowing Capacity $ 2,199,135
Amounts borrowed under commitments $ 1,449,662
Land Development Joint Ventures [Member]  
Schedule of Equity Method Investments [Line Items]  
Number of joint ventures with loan commitments | joint_ventures 4
Line of Credit Facility, Maximum Borrowing Capacity $ 158,805
Amounts borrowed under commitments $ 107,551
Home Building Joint Ventures, Total [Member]  
Schedule of Equity Method Investments [Line Items]  
Number of joint ventures with loan commitments | joint_ventures 1
Line of Credit Facility, Maximum Borrowing Capacity $ 29,786
Amounts borrowed under commitments $ 29,786
Rental Joint Ventures, including the Trust [Member]  
Schedule of Equity Method Investments [Line Items]  
Number of joint ventures with loan commitments | joint_ventures 25
Line of Credit Facility, Maximum Borrowing Capacity $ 2,010,544
Amounts borrowed under commitments $ 1,312,325