Business Combinations (Schedule Of Pro Forma Information) (Details) - UCP, Sundquist Homes, And WJH [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Total revenues	$ 2,297,804	$ 1,990,577	$ 1,403,514
Income before tax expense	148,245	111,038	85,896
Tax expense	(37,061)	(31,753)	(17,848)
Net income	111,184	79,285	68,048
Less: Undistributed earnings allocated to participating securities	(68)	(517)	(1,204)
Numerator for basic and diluted pro forma EPS	$ 111,116	$ 78,768	$ 66,844
Pro forma weighted average shares-basic	30,084,913	28,456,725	24,855,043
Pro forma weighted average shares-diluted	30,391,346	28,760,635	24,967,791
Pro forma basic EPS	$ 3.69	$ 2.77	$ 2.69
Pro forma diluted EPS	$ 3.66	$ 2.74	$ 2.68