Segment Information (Details) $ in Thousands	3 Months Ended		6 Months Ended	9 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2018	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)
Segment Reporting Information [Line Items]
Entity Emerging Growth Company				false
Number of Operating Segments			3
Number of Reportable Segments			2
Revenues:
Total revenues	$ 149,992	$ 113,706		$ 433,267	$ 317,994
Gross profit:
Gross Profit	30,658	25,410		92,406	69,622
Income (loss) before taxes:
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	20,107	17,293		60,948	43,220
Inventory:
Total inventory	648,241			648,241		$ 496,054
Goodwill:
Goodwill	680			680		0
Central
Revenues:
Total revenues					15,013
Builder operations
Revenues:
Total revenues	137,629
Gross profit:
Gross Profit, Home Building	31,905	25,872		95,023	71,367
Inventory:
Total inventory	313,643			313,643		210,884
Builder operations | Southeast [Domain]
Revenues:
Total revenues	77,977	55,840			152,202
Gross profit:
Gross Profit, Home Building	19,058	13,399		49,727	34,521
Income (loss) before taxes:
Results of Operations, Income before Income Taxes	12,649	9,861		33,978	24,176
Inventory:
Total inventory	158,489			158,489		99,613
Goodwill:
Goodwill	680			680		0
Builder operations | Central
Revenues:
Total revenues	59,652	52,597			149,977
Gross profit:
Gross Profit, Home Building	12,847	12,473		45,296	36,846
Income (loss) before taxes:
Results of Operations, Income before Income Taxes	6,984	8,171		28,026	24,424
Inventory:
Total inventory	155,154			155,154		111,271
Land development
Revenues:
Total revenues	12,363	5,269			15,815
Gross profit:
Gross Profit on Land and Lots	2,142	1,749		6,591	4,864
Income (loss) before taxes:
Results of Operations, Income before Income Taxes	1,292	1,516		4,975	3,894
Inventory:
Total inventory	317,669			317,669		272,542
Corporate and Other [Member]
Gross profit:
Other General Expense	(3,389)	(2,211)		(9,208)	(6,609)
Income (loss) before taxes:
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(818)	(2,255)		(6,031)	(9,274)
Inventory:
Total inventory	16,929			16,929		$ 12,628
Real Estate, Other [Member]
Revenues:
Total revenues	12,593	5,269		31,624	15,815
Real Estate, Other [Member] | Southeast [Domain]
Revenues:
Total revenues	230	0		4,570	802
Real Estate, Other [Member] | Central
Revenues:
Total revenues	12,363	5,269		27,054
Real Estate, Other [Member] | Builder operations
Revenues:
Total revenues	$ 200	$ 0		$ 4,600
Real Estate, Other [Member] | Builder operations | Operating Segments [Member]
Revenues:
Total revenues					$ 0