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Investments in Unconsolidated Joint Ventures - JV Investments (Details) $ in Thousands	Sep. 30, 2021 USD ($) home	Dec. 31, 2020 USD ($)
Schedule of Equity Method Investments [Line Items]
Percent Ownership	20.00%
Completed Homes | home	1,729
Balances | $	$ 110,586	$ 93,109
Alaska JV
Schedule of Equity Method Investments [Line Items]
Percent Ownership	20.00%
Completed Homes | home	335
Balances | $	$ 21,970	26,020
Institutional Investor JV
Schedule of Equity Method Investments [Line Items]
Percent Ownership	20.00%
Completed Homes | home	966
Balances | $	$ 28,774	34,112
J.P. Morgan JV
Schedule of Equity Method Investments [Line Items]
Percent Ownership	20.00%
Completed Homes | home	428
Balances | $	$ 59,842	$ 32,977

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