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Business Combination (Narrative) (Details) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2021 | Mar. 31, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Mar. 31, 2019
Assets acquired |  |  |  |  |  |  |  |  |
Goodwill | $ 680,000 |  |  | $ 680,000 |  | $ 680,000 |  |  |
Liabilities assumed |  |  |  |  |  |  |  |  |
Homebuilding revenues | 373,806,000 |  | $ 232,833,000 | 608,285,000 | $ 446,100,000 |  |  |  |
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest | 73,977,000 |  | 36,185,000 | 109,239,000 | 58,941,000 |  |  |  |
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest | 742,000 |  | 686,000 | 1,071,000 | 1,242,000 |  |  |  |
Temporary Equity, Accretion to Redemption Value |  |  |  | (3,007,000) | (863,000) |  |  |  |
Payment for Contingent Consideration Liability, Operating Activities |  |  |  | (368,000) | (5,267,000) |  |  |  |
Redeemable Noncontrolling Interest, Equity, Common, Carrying Amount | 17,515,000 |  | 12,485,000 | 17,515,000 | 12,485,000 | 13,543,000 | $ 15,701,000 | $ 13,611,000 | $ 11,412,000
Payments for Repurchase of Redeemable Noncontrolling Interest | (106,000) |  | (1,505,000) | (106,000) | $ (1,505,000) |  |  |  |
Noncontrolling Interest, Change in Redemption Value | $ 1,178,000 |  | $ 1,892,000 | $ (3,007,000) |  |  |  |  |
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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