Land Under Development - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 Lot Parcels	Dec. 31, 2011 Parcels Lot
Number of raw parcels of land acquired	3	3
Purchase price of raw parcels of land	$ 68,336
Number of finished lots for use in homebuilding operations	700	800
Interest cost incurred	7,900
Interest cost capitalized	890
Cost basis of raw parcels of land, including development costs		$ 78,000