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Business Combination (Narrative) (Details) - USD ($) | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020 | Jun. 30, 2020 | Dec. 31, 2019 | Jun. 30, 2019
Assets acquired |  |  |  |  |  |  |  |  |  |
Goodwill | $ 680,000 |  |  |  | $ 680,000 |  | $ 680,000 |  |  |
Liabilities assumed |  |  |  |  |  |  |  |  |  |
Homebuilding revenues | 342,340,000 |  |  | $ 275,821,000 | 950,625,000 | $ 721,921,000 |  |  |  |
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest | 65,158,000 |  |  | 45,923,000 | 174,397,000 | 104,864,000 |  |  |  |
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest | 623,000 |  |  | 501,000 | 1,694,000 | 1,743,000 |  |  |  |
Temporary Equity, Accretion to Redemption Value |  |  |  |  | (2,275,000) | (225,000) |  |  |  |
Payment for Contingent Consideration Liability, Operating Activities |  |  |  |  | (368,000) | (5,267,000) |  |  |  |
Redeemable Noncontrolling Interest, Equity, Common, Carrying Amount | 17,406,000 |  |  | 13,624,000 | 17,406,000 | 13,624,000 | $ 13,543,000 | $ 17,515,000 | $ 13,611,000 | $ 12,485,000
Payments for Repurchase of Redeemable Noncontrolling Interest | 0 |  |  | 0 | (106,000) | $ (1,505,000) |  |  |  |
Noncontrolling Interest, Change in Redemption Value | $ (732,000) |  |  | $ (638,000) | $ 2,275,000 |  |  |  |  |
Contingent Consideration Earned |  |  | $ 0.4 |  |  |  |  |  |  |
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Paid |  | $ 0.1 |  |  |  |  |  |  |  |
GHO Homes [Member] |  |  |  |  |  |  |  |  |  |
Liabilities assumed |  |  |  |  |  |  |  |  |  |
Ownership percentage by noncontrolling owners | 20.00% |  |  |  | 20.00% |  |  |  |  |

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