Segment Information (Land-Related Charges By Segment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information
Total land-related charges	$ 27,101	$ 99,446	$ 191,913
Northeast [Member]
Segment Reporting Information
Total land-related charges	1,122	74,488	51,362
Southeast [Member]
Segment Reporting Information
Total land-related charges	15,697	8,140	55,689
Florida [Member]
Segment Reporting Information
Total land-related charges	2,811	1,166	9,702
Texas [Member]
Segment Reporting Information
Total land-related charges	1,151	1,204	2,521
Midwest [Member]
Segment Reporting Information
Total land-related charges	2,581	7,361	8,917
West [Member]
Segment Reporting Information
Total land-related charges	2,568	5,159	56,996
Other Homebuilding [Member]
Segment Reporting Information
Total land-related charges	$ 1,171	$ 1,928	$ 6,726