Supplemental Guarantor Information Supplemental Condensed Consolidating Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Home sales	$ 96,929	$ 78,836	$ 166,335	$ 121,139
Fee building revenues	47,181	30,028	102,798	72,965
Revenue, Net	144,110	108,864	269,133	194,104
Home sales	82,488	69,390	142,553	106,060
Home sales impairments	1,300	0	1,300	0
Fee building	45,899	28,317	99,825	69,231
Cost of Sales	129,687	97,707	243,678	175,291
Home sales	13,141	9,446	22,482	15,079
Gross Profit Fee Building	1,282	1,711	2,973	3,734
Gross Profit	14,423	11,157	25,455	18,813
Selling and marketing expenses	(6,376)	(5,046)	(11,377)	(8,522)
General and administrative expenses	(5,595)	(5,833)	(10,685)	(11,008)
Equity in net income of unconsolidated joint ventures	201	3,947	507	3,940
Income (Loss) from Subsidiaries, before Tax	0	0	0	0
Other income (expense), net	(148)	(286)	(35)	(395)
Income before income taxes	2,505	3,939	3,865	2,828
Provision for income taxes	(988)	(1,495)	(1,512)	(1,253)
Net income	1,517	2,444	2,353	1,575
Net loss attributable to noncontrolling interest	0	65	10	120
Net Income (Loss) Attributable to Parent	1,517	2,509	2,363	1,695
Guarantor Subsidiaries [Member]
Home sales	96,929	77,486	166,335	115,982
Fee building revenues	47,181	30,068	102,798	73,120
Revenue, Net	144,110	107,554	269,133	189,102
Home sales	82,488	68,152	142,522	101,422
Home sales impairments	1,300		1,300
Fee building	45,304	27,821	98,740	68,265
Cost of Sales	129,092	95,973	242,562	169,687
Home sales	13,141	9,334	22,513	14,560
Gross Profit Fee Building	1,877	2,247	4,058	4,855
Gross Profit	15,018	11,581	26,571	19,415
Selling and marketing expenses	(6,376)	(4,820)	(11,377)	(7,838)
General and administrative expenses	(5,220)	(2,550)	(9,531)	(4,542)
Equity in net income of unconsolidated joint ventures	201	3,947	507	3,940
Income (Loss) from Subsidiaries, before Tax	0	0	0	0
Other income (expense), net	(174)	(229)	(79)	(369)
Income before income taxes	3,449	7,929	6,091	10,606
Provision for income taxes	(1,427)	(2,997)	(2,376)	(3,971)
Net income	2,022	4,932	3,715	6,635
Net loss attributable to noncontrolling interest	0	0	0	0
Net Income (Loss) Attributable to Parent	2,022	4,932	3,715	6,635
Non-Guarantor Subsidiaries [Member]
Home sales	0	1,350	0	5,157
Fee building revenues	0	0	0	0
Revenue, Net	0	1,350	0	5,157
Home sales	0	1,238	31	4,638
Home sales impairments	0		0
Fee building	0	0	0	0
Cost of Sales	0	1,238	31	4,638
Home sales	0	112	(31)	519
Gross Profit Fee Building	0	0	0	0
Gross Profit	0	112	(31)	519
Selling and marketing expenses	0	(226)	0	(684)
General and administrative expenses	0	0	0	0
Equity in net income of unconsolidated joint ventures	0	0	0	0
Income (Loss) from Subsidiaries, before Tax	0	0	0	0
Other income (expense), net	0	(40)	0	(142)
Income before income taxes	0	(154)	(31)	(307)
Provision for income taxes	0	0	0	0
Net income	0	(154)	(31)	(307)
Net loss attributable to noncontrolling interest	0	65	10	120
Net Income (Loss) Attributable to Parent	0	(89)	(21)	(187)
Parent Company [Member]
Home sales	0	0	0	0
Fee building revenues	0	0	0	0
Revenue, Net	0	0	0	0
Home sales	0	0	0	0
Home sales impairments	0		0
Fee building	595	496	1,085	966
Cost of Sales	595	496	1,085	966
Home sales	0	0	0	0
Gross Profit Fee Building	(595)	(496)	(1,085)	(966)
Gross Profit	(595)	(496)	(1,085)	(966)
Selling and marketing expenses	0	0	0	0
General and administrative expenses	(375)	(3,283)	(1,154)	(6,466)
Equity in net income of unconsolidated joint ventures	0	0	0	0
Income (Loss) from Subsidiaries, before Tax	2,022	4,843	3,694	6,448
Other income (expense), net	26	(57)	44	(39)
Income before income taxes	1,078	1,007	1,499	(1,023)
Provision for income taxes	439	1,502	864	2,718
Net income	1,517	2,509	2,363	1,695
Net loss attributable to noncontrolling interest	0	0	0	0
Net Income (Loss) Attributable to Parent	1,517	2,509	2,363	1,695
Consolidation, Eliminations [Member]
Home sales	0	0	0	0
Fee building revenues	0	(40)	0	(155)
Revenue, Net	0	(40)	0	(155)
Home sales	0	0	0	0
Home sales impairments	0		0
Fee building	0	0	0	0
Cost of Sales	0	0	0	0
Home sales	0	0	0	0
Gross Profit Fee Building	0	(40)	0	(155)
Gross Profit	0	(40)	0	(155)
Selling and marketing expenses	0	0	0	0
General and administrative expenses	0	0	0	0
Equity in net income of unconsolidated joint ventures	0	0	0	0
Income (Loss) from Subsidiaries, before Tax	(2,022)	(4,843)	(3,694)	(6,448)
Other income (expense), net	0	40	0	155
Income before income taxes	(2,022)	(4,843)	(3,694)	(6,448)
Provision for income taxes	0	0	0	0
Net income	(2,022)	(4,843)	(3,694)	(6,448)
Net loss attributable to noncontrolling interest	0	0	0	0
Net Income (Loss) Attributable to Parent	$ (2,022)	$ (4,843)	$ (3,694)	$ (6,448)