Reporting Segments (Schedule Of Segment Reporting Information) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Segment Reporting Information [Line Items]
Total revenue	$ 259,642	$ 189,054	$ 443,738	$ 345,492
Total income before income tax expense	19,097	14,431	31,526	23,955
Total assets	971,112		971,112		$ 917,741
Atlanta [Member]
Segment Reporting Information [Line Items]
Total revenue	90,467	70,260	154,989	126,900
Total income before income tax expense	8,729	6,591	13,979	9,804
Total assets	229,777		229,777		185,331
Central Texas [Member]
Segment Reporting Information [Line Items]
Total revenue	23,925	16,537	53,049	33,573
Total income before income tax expense	1,936	1,089	4,112	3,250
Total assets	122,512		122,512		117,037
Colorado [Member]
Segment Reporting Information [Line Items]
Total revenue	98,024	75,309	166,870	131,128
Total income before income tax expense	12,946	9,624	23,789	17,519
Total assets	313,197		313,197		313,653
Houston [Member]
Segment Reporting Information [Line Items]
Total revenue	15,619	7,085	23,094	17,490
Total income before income tax expense	(892)	(239)	(1,686)	(654)
Total assets	34,812		34,812		51,534
Nevada [Member]
Segment Reporting Information [Line Items]
Total revenue	31,607	19,863	45,736	36,401
Total income before income tax expense	3,740	2,953	4,607	4,770
Total assets	243,186		243,186		220,209
Utah [Member]
Segment Reporting Information [Line Items]
Total income before income tax expense	(157)		(157)
Total assets	5,165		5,165
Corporate [Member]
Segment Reporting Information [Line Items]
Total income before income tax expense	(7,205)	$ (5,587)	(13,118)	$ (10,734)
Total assets	$ 22,463		$ 22,463		$ 29,977