Segment Information - Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Dec. 31, 2015	Dec. 31, 2013
Operating income (loss):
Homebuilding revenues	$ 184,605		$ 75,902	$ 305,838	$ 129,251		$ 499,000	$ 115,000
Amenity and other	2,737		2,727	5,519	5,504
Land sales	754		760	829	3,464
Total revenues	188,096		79,389	312,186	138,219
Expenses
Homebuilding cost of revenues	151,382		63,232	250,379	107,822
Homebuilding selling, general and administrative	25,771		15,922	46,155	29,301
Amenity and other	2,370		2,430	4,956	4,813
Land sales	374		98	390	383
Unallocated income (expenses):
Interest and other income (expense)	(23)		233	1	289
Interest expense	(880)		(2,406)	(2,152)	(5,663)
Income (loss) before income taxes	7,296	$ 900	(4,466)	8,155	(9,474)	$ 30,000
Income tax benefit	110,065		0	109,997	0
Net income (loss)	117,361		(4,466)	118,152	(9,474)
Operating Segments
Expenses
Segment operating income (loss)	12,382		1,989	18,576	3,836
Corporate, Non-Segment
Unallocated income (expenses):
Corporate general and administrative expenses	(4,183)		(4,282)	(8,270)	(7,936)
Florida | Operating Segments
Operating income (loss):
Homebuilding revenues	88,597		56,686	154,644	98,592
Amenity and other	2,737		2,727	5,519	5,504
Land sales	569		760	644	3,464
Total revenues	91,903		60,173	160,807	107,560
Expenses
Homebuilding cost of revenues	69,256		46,023	121,173	80,624
Homebuilding selling, general and administrative	11,977		8,165	21,185	14,753
Amenity and other	2,349		2,394	4,903	4,739
Land sales	203		98	219	383
Segment operating income (loss)	8,118		3,493	13,327	7,061
Arizona | Operating Segments
Operating income (loss):
Homebuilding revenues	40,567		15,277	62,241	25,184
Land sales	185			185	0
Total revenues	40,752		15,277	62,426	25,184
Expenses
Homebuilding cost of revenues	33,890		13,594	52,436	22,207
Homebuilding selling, general and administrative	3,877		2,515	6,919	4,837
Amenity and other	21		36	53	74
Land sales	171			171	0
Segment operating income (loss)	2,793		(868)	2,847	(1,934)
Carolinas | Operating Segments
Operating income (loss):
Homebuilding revenues	55,441		3,939	88,953	5,475
Total revenues	55,441		3,939	88,953	5,475
Expenses
Homebuilding cost of revenues	48,236		3,617	76,770	4,992
Homebuilding selling, general and administrative	5,734		958	9,781	1,774
Segment operating income (loss)	$ 1,471		$ (636)	$ 2,402	$ (1,291)