Business Combinations (Schedule Of Pro Forma Information) (Details) - Wade Jurney Homes [Member] $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) $ / shares shares
Business Acquisition [Line Items]
Total revenues	$ 2,297,804
Income before tax expense	148,245
Income tax expense	(37,061)
Net income	111,184
Less: Undistributed earnings allocated to participating securities	(68)
Numerator for basic and diluted pro forma EPS	$ 111,116
Pro forma weighted average shares-basic | shares	30,084,913
Pro forma weighted average shares-diluted | shares	30,391,346
Pro forma basic EPS | $ / shares	$ 3.69
Pro forma diluted EPS | $ / shares	$ 3.66