Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Interest expense	$ (21,707)	$ (23,559)	$ (23,140)
Income before taxes	661,697	603,212	453,546
Income tax expense	(236,435)	(220,285)	(171,916)
Net income	$ 425,262	$ 382,927	$ 281,630
Basic earnings per share	$ 110.53	$ 95.21	$ 65.83
Diluted earnings per share	$ 103.61	$ 89.99	$ 63.50
Basic weighted average shares outstanding	3,847	4,022	4,278
Diluted weighted average shares outstanding	4,104	4,255	4,435
Homebuilding [Member]
Revenues	$ 5,709,223	$ 5,065,200	$ 4,375,059
Other income	2,820	2,956	2,853
Cost of sales	(4,707,861)	(4,118,782)	(3,568,586)
Selling, general and administrative	(382,459)	(371,127)	(358,851)
Operating income	621,723	578,247	450,475
Interest expense	(20,621)	(22,918)	(22,591)
Income before taxes	601,102	555,329	427,884
Mortgage Banking [Member]
Mortgage banking fees	113,321	93,808	69,509
Interest income	7,569	6,485	4,940
Other income	1,652	1,113	778
General and administrative	(60,861)	(52,882)	(49,016)
Interest expense	(1,086)	(641)	(549)
Income before taxes	$ 60,595	$ 47,883	$ 25,662