Capitalized Interest (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Capitalized Interest [Abstract]
Interest incurred	$ 7,761	$ 6,716
Interest expensed	0	0
Interest capitalized to inventory	(7,761)	(6,195)
Interest Capitalized to Investments in Unconsolidated Joint Ventures	0	(521)
Real Estate Inventory, Capitalized Interest Costs [Roll Forward]
Capitalized interest in beginning inventory	25,681	16,453
Interest capitalized as a cost of inventory	7,761	6,195
Capitalized interest transferred from investment in unconsolidated joint venture to inventory upon lot acquisition	10	0
Previously capitalized interest included in cost of home sales	(4,852)	(2,764)
Capitalized interest in ending inventory	28,600	19,884
Real Estate Inventory, Capitalized Interest Costs in Unconsolidated Joint Venture [Roll Forward]
Capitalized interest in beginning investment in unconsolidated joint ventures	713	1,472
Interest capitalized to investment in unconsolidated joint ventures	0	(521)
Capitalized interest transferred from investment in unconsolidated joint ventures to inventory upon lot acquisition	(10)	0
Previously capitalized interest included in equity in net income of unconsolidated joint ventures	(31)	(31)
Capitalized interest in ending investment in unconsolidated joint ventures	672	1,962
Total capitalized interest in ending inventory and investments in unconsolidated joint ventures	$ 29,272	$ 21,846
Capitalized interest as a percentage of inventory	5.10%	4.30%
Interest included in cost of home sales as a percentage of home sales revenue	4.90%	3.40%
Capitalized interest as a percentage of investment in and advances to unconsolidated joint ventures	2.00%	3.40%