Real Estate Inventory And Land Deposits - Schedule of Interest Capitalized, Incurred, Expensed and Amortized (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Capitalized Interest Costs
Interest capitalized — beginning of period	$ 105,148	$ 94,880	$ 71,263
Interest incurred	88,345	93,431	88,782
Interest amortized to cost of home closings	(90,851)	(83,163)	(65,165)
Interest capitalized — end of period	$ 102,642	$ 105,148	$ 94,880