Condensed Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Interest expense	$ (5,775)	$ (5,682)	$ (17,292)	$ (16,622)
Income before taxes	143,791	131,590	302,322	266,876
Income tax expense	(53,639)	(48,655)	(120,143)	(98,210)
Net income	90,152	82,935	182,179	168,666
Basic earnings per share	$ 21.49	$ 18.08	$ 42.01	$ 35.01
Diluted earnings per share	$ 20.70	$ 17.67	$ 40.59	$ 34.13
Basic weighted average shares outstanding	4,196	4,588	4,336	4,817
Diluted weighted average shares outstanding	4,354	4,695	4,489	4,942
Homebuilding [Member]
Revenues	1,185,160	1,167,595	3,068,427	2,910,673
Other income	905	1,030	2,354	3,154
Cost of sales	(960,055)	(964,416)	(2,497,985)	(2,422,789)
Selling, general and administrative	(83,881)	(78,897)	(268,096)	(239,430)
Operating income	142,129	125,312	304,700	251,608
Interest expense	(5,618)	(5,525)	(16,895)	(16,214)
Income before taxes	136,511	119,787	287,805	235,394
Mortgage Banking [Member]
Mortgage banking fees	18,006	21,372	48,103	58,442
Interest income	1,373	1,396	3,382	3,398
Other income	240	218	493	509
General and administrative	(12,182)	(11,026)	(37,064)	(30,459)
Interest expense	(157)	(157)	(397)	(408)
Income before taxes	$ 7,280	$ 11,803	$ 14,517	$ 31,482