Segment Information - Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating income (loss):
Homebuilding revenues									$ 821,616	$ 764,041	$ 498,915
Amenity and other									17,061	11,698	12,385
Land sales									4,576	3,566	6,466
Total revenues	$ 280,772	$ 205,739	$ 201,194	$ 155,548	$ 261,692	$ 205,427	$ 188,096	$ 124,090	843,253	779,305	517,766
Expenses
Homebuilding cost of revenue									682,504	625,471	405,538
Homebuilding selling, general and administrative									106,391	100,219	79,586
Amenity and other									14,838	11,148	10,702
Land sales									1,785	1,230	823
Unallocated income (expenses):
Interest income and other									1,063	16	308
Corporate general and administrative expenses									(18,271)	(16,305)	(16,900)
Loss on extinguishment of debt									(9,848)
Interest expense									(10,618)	(3,667)	(9,039)
Income (loss) before income taxes	15,044	(2,349)	1,469	4,168	17,496	11,935	7,296	859	18,332	37,586	12,386
Income tax expense (benefit)	38,589	(872)	822	1,729	438	38	(110,065)	68	(40,268)	109,521	(436)
Net income (loss)	$ (23,545)	$ (1,477)	$ 647	$ 2,439	$ 17,058	$ 11,897	$ 117,361	$ 791	(21,936)	147,107	11,950
Operating Segments
Expenses
Segment operating income (loss)									56,006	57,542	38,017
Florida | Operating Segments
Operating income (loss):
Homebuilding revenues									363,477	373,383	300,260
Amenity and other									17,061	11,698	12,385
Land sales									3,349	3,116	6,466
Total revenues									383,887	388,197	319,111
Expenses
Homebuilding cost of revenue									287,415	291,372	239,001
Homebuilding selling, general and administrative									40,478	46,113	38,500
Amenity and other									14,749	11,062	10,587
Land sales									579	770	823
Segment operating income (loss)									40,666	38,880	30,200
Unallocated income (expenses):
Interest expense									0	0	0
Carolinas | Operating Segments
Operating income (loss):
Homebuilding revenues									306,068	238,549	114,277
Land sales									1,042	265
Total revenues									307,110	238,814	114,277
Expenses
Homebuilding cost of revenue									266,642	205,348	95,232
Homebuilding selling, general and administrative									32,444	22,807	12,205
Land sales									1,026	289
Segment operating income (loss)									6,998	10,370	6,840
Unallocated income (expenses):
Interest expense									0	0	0
Arizona | Operating Segments
Operating income (loss):
Homebuilding revenues									152,071	152,109	84,378
Land sales									185	185
Total revenues									152,256	152,294	84,378
Expenses
Homebuilding cost of revenue									128,447	128,751	71,305
Homebuilding selling, general and administrative									15,198	14,994	11,981
Amenity and other									89	86	115
Land sales									180	171
Segment operating income (loss)									8,342	8,292	977
Unallocated income (expenses):
Interest expense									$ 0	$ 0	$ 0