Related Party Transactions - Additional Information (Detail) - Elm Street [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) Lot	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Related Party Transaction [Line Items]
Related party forward lot purchase agreements purchase price	$ 65,200
Number of related parties for forward lot purchase agreement | Lot	1
Market price of developed lots	$ 44,500	$ 41,200	$ 50,100
Expected number of lots from joint venture with Elm Street | Lot	2,400
Development costs to manage property under related party transactions	$ 143	$ 143	$ 143