Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues	$ 1,582,527	$ 1,687,011
Interest expense	(6,486)	(6,215)
Income before taxes	161,375	218,607
Income tax benefit (expense)	14,328	(30,201)
Net income	$ 175,703	$ 188,406
Basic earnings per share (USD per share)	$ 47.97	$ 52.23
Diluted earnings per share (USD per share)	$ 44.96	$ 47.64
Basic weighted average shares outstanding (in shares)	3,663	3,607
Diluted weighted average shares outstanding (in shares)	3,908	3,955
Home Building [Member]
Revenues	$ 1,555,707	$ 1,643,206
Other income	5,336	5,737
Cost of Goods and Services Sold	1,294,743	1,338,806
Selling, general and administrative	(110,167)	(115,734)
Operating income	156,133	194,403
Interest expense	(6,214)	(5,993)
Income before taxes	149,919	188,410
Mortgage Banking [Member]
Revenues	26,821	43,805
Interest income	2,469	2,833
Other income	649	539
General and administrative	(18,211)	(16,758)
Interest expense	(272)	(222)
Income before taxes	$ 11,456	$ 30,197