Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Costs and Expenses [Abstract]
Revenue	$ 714,194	$ 623,686	$ 1,291,797	$ 1,104,795
Land and housing	557,791	503,857	1,018,715	892,324
General and administrative	41,037	36,164	74,884	66,863
Selling	41,127	37,452	77,955	69,003
Equity in loss (income) from joint venture arrangements	(3)	(187)	(55)	(66)
Interest	2,515	5,197	7,215	11,989
Total costs and expenses	642,467	582,483	1,178,714	1,040,113
Income before income taxes	71,727	41,203	113,083	64,682
Provision for income taxes	17,219	10,957	26,829	16,713
Net income	$ 54,508	$ 30,246	$ 86,254	$ 47,969
Earnings per common share:
Basic	$ 1.91	$ 1.10	$ 3.03	$ 1.74
Diluted	$ 1.89	$ 1.08	$ 2.98	$ 1.71
Weighted Average Number of Shares Outstanding [Abstract]
Basic	28,531	27,599	28,504	27,549
Diluted	28,836	28,090	28,920	28,027