Reporting Segments (Schedule Of Total Revenue And Pretax Income By Segment) (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018 USD ($) state	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2018 USD ($) state segment region	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Segment Reporting Information [Line Items]
Number of operating states | state	15								15
Number of operating regions | region									4
Number of operating segments | segment									5
Total revenue									$ 2,147,413	$ 1,423,799	$ 994,440
Total income (loss) before income tax expense	$ 36,062	$ 22,859	$ 46,502	$ 23,107	$ 33,848	$ 15,156	$ 23,109	$ 12,051	128,530	84,164	73,149
West [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenue									459,254	210,696
Total income (loss) before income tax expense									38,380	14,640
Mountain [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenue									701,985	616,517	504,293
Total income (loss) before income tax expense									89,048	75,704	66,613
Texas [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenue									213,508	165,170	147,006
Total income (loss) before income tax expense									13,682	10,952	2,686
Southeast [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenue									530,891	421,563	343,141
Total income (loss) before income tax expense									$ 33,267	29,662	31,138
Wade Jurney Homes [Member]
Segment Reporting Information [Line Items]
Number of operating states | state	9								9
Wade Jurney Homes [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenue									$ 210,051
Total income (loss) before income tax expense									(754)
Financial Services [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenue									31,724	9,853
Total income (loss) before income tax expense									8,766	1,225
Corporate [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenue
Total income (loss) before income tax expense									$ (53,859)	$ (48,019)	$ (27,288)