Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Costs and Expenses [Abstract]
Revenue	$ 847,921	$ 653,345	$ 2,139,718	$ 1,758,140
Land and housing	653,407	519,164	1,672,122	1,411,488
General and administrative	48,879	39,385	123,763	106,248
Selling	49,539	40,147	127,494	109,150
Equity in loss (income) from joint venture arrangements	(252)	(52)	(307)	(118)
Interest	1,239	4,637	8,454	16,626
Total costs and expenses	752,812	603,281	1,931,526	1,643,394
Income before income taxes	95,109	50,064	208,192	114,746
Provision for income taxes	21,572	12,226	48,401	28,939
Net income	$ 73,537	$ 37,838	$ 159,791	$ 85,807
Earnings per common share:
Basic	$ 2.57	$ 1.35	$ 5.60	$ 3.10
Diluted	$ 2.51	$ 1.32	$ 5.50	$ 3.04
Weighted Average Number of Shares Outstanding [Abstract]
Basic	28,653	27,981	28,554	27,695
Diluted	29,286	28,598	29,030	28,238