Supplemental Guarantor Information (Supplemental Condensed Consolidated Statement Of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended								5 Months Ended	12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jun. 14, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues
Total revenues										$ 2,535,911	$ 2,147,413	$ 1,423,799
Selling, general and administrative										(301,525)	(263,981)	(176,304)
Loss on debt extinguishment										(10,832)
Inventory impairment and other										(4,783)
Acquisition expense											(437)	(9,905)
Equity in income of unconsolidated subsidiaries									$ 14,800		14,849	12,176
Other income (expense)										(5,190)	(905)	2,937
Income before tax expense	$ 53,968	$ 34,840	$ 20,830	$ 22,997	$ 36,062	$ 22,859	$ 46,502	$ 23,107		132,635	128,530	84,164
Income tax expense										(19,641)	(32,075)	(33,869)
Net income	53,358	27,024	15,495	17,117	26,195	17,048	33,193	20,019		112,994	96,455	50,295
Parent
Revenues
Selling, general and administrative										(74,145)	(70,578)	(49,072)
Loss on debt extinguishment										(10,832)
Acquisition expense											(437)	(9,905)
Equity in earnings from consolidated subsidiaries										167,503	138,746	84,425
Equity in income of unconsolidated subsidiaries											14,849	12,176
Other income (expense)										(5,725)	(299)	1,080
Income before tax expense										76,801	82,281	38,704
Income tax expense										36,193	14,174	11,591
Net income										112,994	96,455	50,295
Guarantor Subsidiaries [Member]
Revenues
Total revenues										2,492,649	2,115,689	1,413,946
Selling, general and administrative										(227,380)	(193,403)	(127,232)
Inventory impairment and other										(4,783)
Other income (expense)										372	(606)	1,820
Income before tax expense										212,487	176,229	128,659
Income tax expense										(53,122)	(44,057)	(45,031)
Net income										159,365	132,172	83,628
Non Guarantor Subsidiaries [Member]
Revenues
Total revenues										43,262	31,724	9,853
Other income (expense)										163		37
Income before tax expense										10,850	8,766	1,226
Income tax expense										(2,712)	(2,192)	(429)
Net income										8,138	6,574	797
Elimination Entries [Member]
Revenues
Equity in earnings from consolidated subsidiaries										(167,503)	(138,746)	(84,425)
Income before tax expense										(167,503)	(138,746)	(84,425)
Net income										(167,503)	(138,746)	(84,425)
Home Sales [Member]
Revenues
Total revenues	$ 775,667	$ 573,860	$ 608,636	$ 523,302	$ 640,187	$ 552,876	$ 522,164	$ 394,831		2,481,465	2,110,058	1,405,443
Cost of revenues										(2,040,241)	(1,741,619)	(1,153,359)
Home Sales [Member] | Guarantor Subsidiaries [Member]
Revenues
Total revenues										2,481,465	2,110,058	1,405,443
Cost of revenues										(2,040,241)	(1,741,619)	(1,153,359)
Land Sales And Other [Member]
Revenues
Total revenues										11,184	5,631	8,503
Cost of revenues										(8,130)	(3,832)	(6,516)
Land Sales And Other [Member] | Guarantor Subsidiaries [Member]
Revenues
Total revenues										11,184	5,631	8,503
Cost of revenues										(8,130)	(3,832)	(6,516)
Homebuilding [Member]
Revenues
Total revenues										2,492,649	2,115,689	1,413,946
Cost of revenues										(2,048,371)	(1,745,451)	(1,159,875)
Homebuilding [Member] | Guarantor Subsidiaries [Member]
Revenues
Total revenues										2,492,649	2,115,689	1,413,946
Cost of revenues										(2,048,371)	(1,745,451)	(1,159,875)
Financial Services [Member]
Revenues
Total revenues										43,262	31,724	9,853
Cost of revenues										(32,575)	(22,958)	(8,664)
Financial Services [Member] | Non Guarantor Subsidiaries [Member]
Revenues
Total revenues										43,262	31,724	9,853
Cost of revenues										$ (32,575)	$ (22,958)	$ (8,664)