Business Combination (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Assets acquired
Goodwill	$ 680		$ 680
Liabilities assumed
Homebuilding revenues	213,267	$ 168,628
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	22,756	15,319
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest	556	644	1,500
Temporary Equity, Accretion to Redemption Value	2,755	1,120
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low	0
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	$ 0	$ 454	$ (5,300)
GHO Homes [Member]
Liabilities assumed
Ownership percentage by noncontrolling owners	20.00%
GHO Homes [Member]
Liabilities assumed
Percent of equity interests acquired	80.00%

Percentage of voting equity interests acquired at the acquisition date in the business combination.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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