Land and Other Inventories (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Land and Other Inventories
Land held for future development	$ 29,312	$ 29,089
Land developed and in process of development	351,798	349,891
Homes completed or under construction	222,741	205,428
Total Land and other inventories	603,851	584,408
Interest Expense
Interest incurred	32,490	26,145	$ 28,207
Interest capitalized	(21,872)	(22,478)	(19,168)
Interest expense	$ 10,618	$ 3,667	$ 9,039