Supplemental Guarantor Information Supplemental Guarantor Information - Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
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
Equity in subsidiaries	0	0	0	0
Net income	73,537	37,838	159,791	85,807
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	(73,537)	(37,838)	(159,791)	(85,807)
Net income	(73,537)	(37,838)	(159,791)	(85,807)
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	73,537	37,838	159,791	85,807
Net income	73,537	37,838	159,791	85,807
Guarantor Subsidiaries [Member]
Revenue	818,975	639,891	2,078,257	1,718,600
Land and housing	653,407	519,164	1,672,122	1,411,488
General and administrative	39,325	32,332	99,065	86,080
Selling	49,539	40,147	127,494	109,150
Equity in loss (income) from joint venture arrangements	0	0	0	0
Interest	531	3,650	6,395	13,962
Total costs and expenses	742,802	595,293	1,905,076	1,620,680
Income before income taxes	76,173	44,598	173,181	97,920
Provision for income taxes	17,533	11,222	41,181	25,555
Equity in subsidiaries	0	0	0	0
Net income	58,640	33,376	132,000	72,365
Non-Guarantor Subsidiaries [Member]
Revenue	28,946	13,454	61,461	39,540
Land and housing	0	0	0	0
General and administrative	9,554	7,053	24,698	20,168
Selling	0	0	0	0
Equity in loss (income) from joint venture arrangements	(252)	(52)	(307)	(118)
Interest	708	987	2,059	2,664
Total costs and expenses	10,010	7,988	26,450	22,714
Income before income taxes	18,936	5,466	35,011	16,826
Provision for income taxes	4,039	1,004	7,220	3,384
Equity in subsidiaries	0	0	0	0
Net income	$ 14,897	$ 4,462	$ 27,791	$ 13,442