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Investment in Joint Venture Arrangements (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]          
Investment in joint venture arrangements $ 45,144   $ 45,144   $ 37,885
Increase (decrease) in investments in unconsolidated joint ventures and other similar arrangements     7,300    
Investment in joint venture arrangements     19,089 $ 15,281  
Distribution of single-family lots from joint venture arrangements     11,522 9,723  
Company's investment in joint development or similar agreements 42,900   42,900   35,500
Equity invested in LLCs 2,200   2,200   $ 2,400
Equity in loss (income) from joint venture arrangements $ (3) $ (187) $ (55) $ (66)  
Maximum [Member]          
Schedule of Equity Method Investments [Line Items]          
Equity Method Investment, Ownership Percentage 74.00%   74.00%   74.00%
Minimum [Member]          
Schedule of Equity Method Investments [Line Items]          
Equity Method Investment, Ownership Percentage 25.00%   25.00%   25.00%