Supplemental Guarantor Information Supplemental Guarantor Information - Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
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
Equity in subsidiaries	0	0	0	0
Net income	54,508	30,246	86,254	47,969
Consolidation, Eliminations [Member]
Revenue	0	0	0	0
Land and housing	0	0	0	0
General and administrative	0	0	0	0
Selling	0	0	0	0
Equity in loss (income) from joint venture arrangements	0	0	0	0
Interest	0	0	0	0
Total costs and expenses	0	0	0	0
Income before income taxes	0	0	0	0
Provision for income taxes	0	0	0	0
Equity in subsidiaries	(54,508)	(30,246)	(86,254)	(47,969)
Net income	(54,508)	(30,246)	(86,254)	(47,969)
Parent Company [Member]
Revenue	0	0	0	0
Land and housing	0	0	0	0
General and administrative	0	0	0	0
Selling	0	0	0	0
Equity in loss (income) from joint venture arrangements	0	0	0	0
Interest	0	0	0	0
Total costs and expenses	0	0	0	0
Income before income taxes	0	0	0	0
Provision for income taxes	0	0	0	0
Equity in subsidiaries	54,508	30,246	86,254	47,969
Net income	54,508	30,246	86,254	47,969
Guarantor Subsidiaries [Member]
Revenue	695,146	609,383	1,259,282	1,078,709
Land and housing	557,791	503,857	1,018,715	892,324
General and administrative	33,177	29,315	59,740	53,748
Selling	41,127	37,452	77,955	69,003
Equity in loss (income) from joint venture arrangements	0	0	0	0
Interest	1,895	4,263	5,864	10,312
Total costs and expenses	633,990	574,887	1,162,274	1,025,387
Income before income taxes	61,156	34,496	97,008	53,322
Provision for income taxes	15,067	9,578	23,648	14,333
Equity in subsidiaries	0	0	0	0
Net income	46,089	24,918	73,360	38,989
Non-Guarantor Subsidiaries [Member]
Revenue	19,048	14,303	32,515	26,086
Land and housing	0	0	0	0
General and administrative	7,860	6,849	15,144	13,115
Selling	0	0	0	0
Equity in loss (income) from joint venture arrangements	(3)	(187)	(55)	(66)
Interest	620	934	1,351	1,677
Total costs and expenses	8,477	7,596	16,440	14,726
Income before income taxes	10,571	6,707	16,075	11,360
Provision for income taxes	2,152	1,379	3,181	2,380
Equity in subsidiaries	0	0	0	0
Net income	$ 8,419	$ 5,328	$ 12,894	$ 8,980