Investment in Joint Venture Arrangements Investment in Joint Venture Arrangements (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Summarized Financial Information, Equity Excluding Noncontrolling Interests	$ 2,400	$ 2,600
Minimum [Member]
Schedule of Equity Method Investments [Line Items]
Discount Rate Used in Determining Fair Value of land and lots	13.00%	13.00%
Equity Method Investment, Ownership Percentage	25.00%	25.00%
Maximum [Member]
Schedule of Equity Method Investments [Line Items]
Discount Rate Used in Determining Fair Value of land and lots	16.00%	16.00%
Equity Method Investment, Ownership Percentage	74.00%	97.00%