Supplemental Guarantor Information (Supplemental Condensed Consolidated Statement Of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues
Total revenues	$ 602,609	$ 533,057
Selling, general and administrative	(73,619)	(68,936)
Inventory impairment	(781)
Other income (expense)	158	76
Income before income tax expense	34,088	22,997
Income tax expense	(7,962)	(5,880)
Net income	26,126	17,117
Parent [Member]
Revenues
Selling, general and administrative	(13,475)	(18,655)
Equity in income of unconsolidated subsidiaries	35,428	31,163
Other income (expense)	326	101
Income before income tax expense	22,279	12,609
Income tax expense	3,847	4,508
Net income	26,126	17,117
Guarantor Subsidiaries [Member]
Revenues
Total revenues	592,814	524,657
Selling, general and administrative	(60,144)	(50,281)
Inventory impairment	(781)
Other income (expense)	(304)	(45)
Income before income tax expense	46,892	39,960
Income tax expense	(11,723)	(9,990)
Net income	35,169	29,970
Non Guarantor Subsidiaries [Member]
Revenues
Total revenues	9,795	8,400
Other income (expense)	136	20
Income before income tax expense	345	1,591
Income tax expense	(86)	(398)
Net income	259	1,193
Elimination Entries [Member]
Revenues
Equity in income of unconsolidated subsidiaries	(35,428)	(31,163)
Income before income tax expense	(35,428)	(31,163)
Net income	(35,428)	(31,163)
Home Sales [Member]
Revenues
Total revenues	572,710	523,302
Cost of revenues	(470,526)	(433,757)
Home Sales [Member] | Guarantor Subsidiaries [Member]
Revenues
Total revenues	572,710	523,302
Cost of revenues	(470,526)	(433,757)
Land Sales And Other [Member]
Revenues
Total revenues	20,104	1,355
Cost of revenues	(14,167)	(614)
Land Sales And Other [Member] | Guarantor Subsidiaries [Member]
Revenues
Total revenues	20,104	1,355
Cost of revenues	(14,167)	(614)
Homebuilding [Member]
Revenues
Total revenues	592,814	524,657
Cost of revenues	(484,693)	(434,371)
Homebuilding [Member] | Guarantor Subsidiaries [Member]
Revenues
Total revenues	592,814	524,657
Cost of revenues	(484,693)	(434,371)
Financial Services [Member]
Revenues
Total revenues	9,795	8,400
Cost of revenues	(9,586)	(6,829)
Financial Services [Member] | Non Guarantor Subsidiaries [Member]
Revenues
Total revenues	9,795	8,400
Cost of revenues	$ (9,586)	$ (6,829)