Inventory and Capitalized Interest Capitalized Interest Rollforward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Real Estate Inventory, Capitalized Interest Costs [Roll Forward]
Capitalized interest, beginning of period	$ 21,607	$ 20,765	$ 17,169
Interest capitalized to inventory	32,408	30,253	29,053
Capitalized interest charged to cost of sales	(32,686)	(29,411)	(25,457)
Capitalized interest, end of year	21,329	21,607	20,765
Interest incurred	$ 42,092	$ 51,628	$ 49,537