Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Costs and Expenses [Abstract]
Revenue	$ 904,319	$ 847,921	$ 2,694,135	$ 2,139,718
Land and housing	682,565	653,407	2,028,822	1,672,122
General and administrative	49,420	48,879	143,703	123,763
Selling	47,114	49,539	143,379	127,494
Equity in loss (income) from joint venture arrangements	50	(252)	(145)	(307)
Interest income	(74)
Interest expense		1,239	1,554	8,454
Gain (Loss) on Extinguishment of Debt	9,072	0	9,072	0
Total costs and expenses	788,147	752,812	2,326,385	1,931,526
Income before income taxes	116,172	95,109	367,750	208,192
Provision for income taxes	25,160	21,572	84,265	48,401
Net income	$ 91,012	$ 73,537	$ 283,485	$ 159,791
Earnings per common share:
Basic	$ 3.11	$ 2.57	$ 9.72	$ 5.60
Diluted	$ 3.03	$ 2.51	$ 9.46	$ 5.50
Weighted Average Number of Shares Outstanding [Abstract]
Basic	29,250	28,653	29,179	28,554
Diluted	30,028	29,286	29,966	29,030