Basis of Presentation Basis of Presentation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Revenue	$ 558,098	$ 456,866	$ 995,955	$ 863,846
Gain (Loss) on Hedging Activity	200	(2,000)	3,200	2,600
Geographical [Domain]
Disaggregation of Revenue [Line Items]
Revenue	558,098	456,866	995,955	863,846
Midwest Homebuilding [Member]
Disaggregation of Revenue [Line Items]
Revenue	226,902	168,469	385,522	314,891
Southern Homebuilding [Member]
Disaggregation of Revenue [Line Items]
Revenue	237,582	178,780	427,970	328,145
Mid-Atlantic Homebuilding [Member]
Disaggregation of Revenue [Line Items]
Revenue	81,738	97,749	155,561	194,635
Financial Services [Member]
Disaggregation of Revenue [Line Items]
Revenue	11,876	11,868	26,902	26,175
Construction [Member]
Disaggregation of Revenue [Line Items]
Revenue	545,034	443,093	963,458	830,551
Land [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 1,188	$ 1,905	$ 5,595	$ 7,120