Business Combinations (Schedule Of Pro Forma Information) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Wade Jurney Homes [Member]
Business Acquisition [Line Items]
Total revenues		$ 1,645,858
Income before tax expense		87,092
Tax expense		(21,773)
Net income		65,319
Less: Undistributed earnings allocated to participating securities		(54)
Numerator for basic and diluted pro forma EPS		$ 65,265
Pro forma weighted average shares-basic		29,885,858
Pro forma weighted average shares-diluted		30,189,058
Pro forma basic EPS		$ 2.18
Pro forma diluted EPS		$ 2.16
UCP, Sundquist Homes, And WJH [Member]
Business Acquisition [Line Items]
Total revenues	$ 507,008		$ 1,373,689
Income before tax expense	30,107		91,445
Tax expense	(9,390)		(23,496)
Net income	20,717		67,949
Less: Undistributed earnings allocated to participating securities	(108)		(520)
Numerator for basic and diluted pro forma EPS	$ 20,609		$ 67,429
Pro forma weighted average shares-basic	27,034,192		26,342,362
Pro forma weighted average shares-diluted	27,314,777		26,579,292
Pro forma basic EPS	$ 0.76		$ 2.56
Pro forma diluted EPS	$ 0.75		$ 2.54