Land Under Development - Additional Information (Detail) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2015 USD ($) Lot Parcel	Jun. 30, 2015 USD ($) Lot Parcel	Jun. 30, 2014 Lot
Real Estate [Abstract]
Number of raw parcels of land acquired | Parcel	4	4
Carrying value of raw parcels of land | $	$ 25,554	$ 25,554
Number of finished lots intended to be developed from raw parcels of land	380	380
Finished lots under lot purchase agreements	90	90
Lots sold to unrelated party	1	6	0
Aggregate sales price of finished lots to unrelated party | $	$ 259	$ 1,535