Inventory (Capitalization of Interest) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Real Estate Inventory, Capitalized Interest Costs [Roll Forward]
Interest capitalized at beginning of period	$ 18,791	$ 17,199	$ 18,596	$ 14,780
Interest incurred	2,010	3,052	7,677	9,066
Interest charged to cost of revenues	(2,999)	(2,324)	(8,471)	(5,919)
Interest capitalized at end of period	$ 17,802	$ 17,927	$ 17,802	$ 17,927
Document Period End Date			Sep. 30, 2020
Capitalized interest as a percentage of inventory	2.30%	2.50%	2.30%	2.50%