Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended								5 Months Ended	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Jun. 14, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues
Total revenues										$ 2,147,413	$ 1,423,799	$ 994,440
Cost of revenues
Selling, general and administrative										(263,981)	(176,304)	(122,224)
Acquisition expense										(437)	(9,905)	(490)
Equity in income of unconsolidated subsidiaries									$ 14,800	14,849	12,176	191
Other income (expense)										(905)	2,937	1,576
Income before income tax expense	$ 36,062	$ 22,859	$ 46,502	$ 23,107	$ 33,848	$ 15,156	$ 23,109	$ 12,051		128,530	84,164	73,149
Income tax expense										(32,075)	(33,869)	(23,609)
Net income	$ 26,195	$ 17,048	$ 33,193	$ 20,019	$ 17,195	$ 9,470	$ 14,831	$ 8,799		$ 96,455	$ 50,295	$ 49,540
Earnings per share:
Basic	$ 0.85	$ 0.56	$ 1.11	$ 0.68	$ 0.61	$ 0.37	$ 0.67	$ 0.40		$ 3.20	$ 2.06	$ 2.34
Diluted	$ 0.85	$ 0.56	$ 1.10	$ 0.67	$ 0.60	$ 0.37	$ 0.66	$ 0.40		$ 3.17	$ 2.03	$ 2.33
Weighted average common shares outstanding:
Basic										30,084,913	24,280,871	20,679,189
Diluted										30,391,346	24,555,509	20,791,937
Home Sales [Member]
Revenues
Total revenues	$ 640,187	$ 552,876	$ 522,164	$ 394,831	$ 516,500	$ 374,935	$ 287,588	$ 226,420		$ 2,110,058	$ 1,405,443	$ 978,733
Cost of revenues
Cost of revenues										(1,741,619)	(1,153,359)	(786,127)
Land Sales And Other [Member]
Revenues
Total revenues										5,631	8,503	15,707
Cost of revenues
Cost of revenues										(3,832)	(6,516)	(14,217)
Homebuilding [Member]
Revenues
Total revenues										2,115,689	1,413,946	994,440
Cost of revenues
Cost of revenues										(1,745,451)	(1,159,875)	$ (800,344)
Financial Services [Member]
Revenues
Total revenues										31,724	9,853
Cost of revenues
Cost of revenues										$ (22,958)	$ (8,664)