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Investment in Joint Venture Arrangements (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]          
Investment in joint venture arrangements $ 42,466   $ 42,466   $ 34,673
Increase (decrease) in investments in unconsolidated joint ventures and other similar arrangements     7,800    
Investment in joint venture arrangements     34,738 $ 24,075  
Distribution of single-family lots from joint venture arrangements     26,040 27,016  
Company's investment in joint development or similar agreements 42,300   42,300   33,900
Equity invested in LLCs 200   200   $ 800
Equity in loss (income) from joint venture arrangements $ 50 $ (252) (145) (307)  
Return of capital from joint venture arrangements     $ 1,050 $ 1,213  
Maximum [Member]          
Schedule of Equity Method Investments [Line Items]          
Equity Method Investment, Ownership Percentage 50.00%   50.00%   74.00%
Minimum [Member]          
Schedule of Equity Method Investments [Line Items]          
Equity Method Investment, Ownership Percentage 25.00%   25.00%   25.00%