Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Inventory impairments	$ (11,098,000)	$ (4,540,000)	$ (11,848,000)	$ (9,390,000)
Other-than-temporary impairment of marketable securities	0	0	0	(200,000)
Pretax income	67,420,000	89,680,000	194,568,000	177,934,000
Income before income taxes	67,420,000	89,680,000	194,568,000	177,934,000
Provision for income taxes	(14,028,000)	(28,517,000)	(38,513,000)	(60,651,000)
Net income	53,392,000	61,163,000	156,055,000	117,283,000
Other comprehensive loss related to available for sale securities, net of tax		(23,175,000)		(19,245,000)
Comprehensive income	$ 53,392,000	$ 37,988,000	$ 156,055,000	$ 98,038,000
Earnings per share:
Basic (in dollars per share)	$ 0.94	$ 1.09	$ 2.77	$ 2.10
Diluted (in dollars per share)	$ 0.93	$ 1.07	$ 2.72	$ 2.07
Weighted average common shares outstanding:
Basic (in shares)	56,171,619	55,782,389	56,023,996	55,623,225
Diluted (in shares)	57,226,659	56,809,208	57,029,715	56,428,247
Dividends declared per share (in dollars per share)	$ 0.30	$ 0.23	$ 0.90	$ 0.69
Homebuilding Segment [Member]
Revenues	$ 766,027,000	$ 586,287,000	$ 2,123,323,000	$ 1,798,984,000
Cost of sales	(630,346,000)	(490,946,000)	(1,734,131,000)	(1,505,228,000)
Inventory impairments	(11,098,000)	(4,540,000)	(11,848,000)	(9,390,000)
Gross profit	135,681,000	95,341,000	389,192,000	293,756,000
Selling, general and administrative expenses	(83,523,000)	(69,102,000)	(236,435,000)	(206,109,000)
Interest and other income	1,953,000	54,548,000	5,586,000	59,722,000
Other expense	(1,128,000)	(618,000)	(2,562,000)	(1,635,000)
Other-than-temporary impairment of marketable securities				(51,000)
Pretax income	52,983,000	80,169,000	155,781,000	145,683,000
Income before income taxes	52,983,000	80,169,000	155,781,000	145,683,000
Homebuilding Segment [Member] | Home Building [Member]
Revenues	766,027,000	584,947,000	2,123,323,000	1,796,046,000
Cost of sales	(619,248,000)	(485,147,000)	(1,722,283,000)	(1,493,166,000)
Homebuilding Segment [Member] | Land [Member]
Revenues		1,340,000		2,938,000
Cost of sales		(1,259,000)		(2,672,000)
Financial Services Segment [Member]
Revenues	19,611,000	17,464,000	60,018,000	54,516,000
Other-than-temporary impairment of marketable securities		(29,000)		(160,000)
Pretax income	14,437,000	9,511,000	38,787,000	32,251,000
Expenses	(9,408,000)	(8,849,000)	(27,850,000)	(25,247,000)
Interest and other income	4,234,000	925,000	6,619,000	3,142,000
Income before income taxes	$ 14,437,000	$ 9,511,000	$ 38,787,000	$ 32,251,000