Consolidated Statements of Operations and Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Inventory impairments	$ (10,173)	$ (8,775)	$ (1,760)
Interest expense			(685)
Losses on early extinguishments of debt			(18,153)
Other-than-temporary impairment of marketable securities	(1,443)	(3,969)	(4,293)
Pretax income	151,781	101,424	100,475
Income before income taxes	151,781	101,424	100,475
Provision for income taxes	(48,570)	(35,633)	(37,332)
Net income	103,211	65,791	63,143
Other comprehensive income (loss) related to available-for-sale securities, net of tax	6,356	5,260	(1,120)
Comprehensive income	$ 109,567	$ 71,051	$ 62,023
Earnings per share:
Basic (in dollars per share)	$ 2.01	$ 1.28	$ 1.23
Diluted (in dollars per share)	$ 2	$ 1.28	$ 1.23
Weighted average common shares outstanding
Basic (in shares)	51,286,942	51,202,616	51,046,318
Diluted (in shares)	51,447,147	51,415,580	51,258,444
Homebuilding Segment [Member]
Home sales revenue	$ 2,257,153	$ 1,847,889	$ 1,647,398
Land sale revenues	5,700	12,337	3,233
Total home and land sale revenues	2,262,853	1,860,226	1,650,631
Home cost of sales	(1,884,391)	(1,539,396)	(1,365,621)
Land cost of sales	(4,866)	(12,611)	(2,559)
Inventory impairments	(10,173)	(9,993)	(1,760)
Total cost of sales	(1,899,430)	(1,562,000)	(1,369,940)
Gross margin	363,423	298,226	280,691
Selling, general and administrative expenses	(250,540)	(226,317)	(203,253)
Interest and other income	7,012	6,709	26,310
Interest expense			(685)
Other expense	(3,447)	(4,208)	(4,813)
Losses on early extinguishments of debt			(18,153)
Other-than-temporary impairment of marketable securities	(1,070)	(3,969)	(4,293)
Pretax income	115,378	70,441	75,804
Income before income taxes	115,378	70,441	75,804
Financial Services Segment [Member]
Other-than-temporary impairment of marketable securities	(373)
Pretax income	36,403	30,983	24,671
Revenues	63,991	48,810	43,953
Expenses	(30,920)	(21,572)	(22,334)
Interest and other income	3,705	3,745	3,052
Income before income taxes	$ 36,403	$ 30,983	$ 24,671