Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Interest expense	$ (5,914)	$ (4,814)	$ (11,750)	$ (9,902)
Income before taxes	208,968	144,720	341,129	248,032
Income tax expense	(61,091)	(53,044)	(90,329)	(91,053)
Net income	$ 147,877	$ 91,676	$ 250,800	$ 156,979
Basic earnings per share	$ 39.46	$ 23.51	$ 67.30	$ 40.34
Diluted earnings per share	$ 35.19	$ 22.01	$ 60.36	$ 37.82
Basic weighted average shares outstanding	3,748	3,900	3,726	3,892
Diluted weighted average shares outstanding	4,202	4,165	4,155	4,151
Homebuilding [Member]
Revenues	$ 1,512,714	$ 1,361,741	$ 2,760,301	$ 2,483,245
Other income	1,447	753	2,549	1,520
Cost of sales	(1,218,083)	(1,126,369)	(2,244,100)	(2,052,129)
Selling, general and administrative	(99,100)	(100,043)	(199,004)	(198,058)
Operating income	196,978	136,082	319,746	234,578
Interest expense	(5,641)	(4,554)	(11,219)	(9,396)
Income before taxes	191,337	131,528	308,527	225,182
Mortgage Banking [Member]
Mortgage banking fees	31,778	26,442	61,283	48,964
Interest income	1,554	1,437	3,215	3,111
Other income	506	409	815	667
General and administrative	(15,934)	(14,836)	(32,180)	(29,386)
Interest expense	(273)	(260)	(531)	(506)
Income before taxes	$ 17,631	$ 13,192	$ 32,602	$ 22,850