Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Homebuilding [Member]
Home sale revenues	$ 571,195,000	$ 461,708,000	$ 965,615,000	$ 838,717,000
Land sale revenues	316,000		2,640,000	910,000
Total home and land sale revenues	571,511,000	461,708,000	968,255,000	839,627,000
Home cost of sales	(475,836,000)	(385,019,000)	(805,862,000)	(703,661,000)
Land cost of sales	(216,000)		(1,879,000)	(1,125,000)
Inventory impairments	(1,600,000)		(1,600,000)	(350,000)
Total cost of sales	(477,652,000)	(385,019,000)	(809,341,000)	(705,136,000)
Gross margin	93,859,000	76,689,000	158,914,000	134,491,000
Selling, general and administrative expenses	(64,440,000)	(54,781,000)	(120,717,000)	(105,313,000)
Interest and other income	2,553,000	2,720,000	3,489,000	4,574,000
Other expense	(278,000)	(1,055,000)	(905,000)	(2,189,000)
Other-than-temporary impairment of marketable securities	(288,000)		(719,000)
Homebuilding pretax income	31,406,000	23,573,000	40,062,000	31,563,000
Financial Services [Member]
Homebuilding pretax income	9,052,000	8,309,000	14,669,000	13,645,000
Revenues	15,823,000	11,420,000	26,840,000	22,011,000
Expenses	(7,543,000)	(4,207,000)	(13,784,000)	(10,366,000)
Interest and other income	772,000	1,096,000	1,613,000	2,000,000
Inventory impairments	(1,600,000)		(1,600,000)	(350,000)
Other-than-temporary impairment of marketable securities	(300,000)	0	(719,000)	0
Homebuilding pretax income	40,458,000	31,882,000	54,731,000	45,208,000
Provision for income taxes	(13,545,000)	(11,884,000)	(18,255,000)	(16,790,000)
Net income	26,913,000	19,998,000	36,476,000	28,418,000
Other comprehensive income (loss) related to available for sale securities, net of tax	895,000	(360,000)	2,843,000	948,000
Comprehensive income	$ 27,808,000	$ 19,638,000	$ 39,319,000	$ 29,366,000
Earnings per share:
Basic (in dollars per share)	$ 0.55	$ 0.41	$ 0.74	$ 0.58
Diluted (in dollars per share)	$ 0.55	$ 0.41	$ 0.74	$ 0.58
Weighted average common shares outstanding
Basic (in shares)	48,851,350	48,768,021	48,839,660	48,741,476
Diluted (in shares)	48,861,742	49,005,037	48,848,914	48,954,059
Dividends declared per share (in dollars per share)	$ 0.25	$ 0.25	$ 0.50	$ 0.50