Variable Interest Entities and Joint Ventures - Condensed Balance Sheet of Consolidated JV (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Cash	$ 1,005	$ 462
Restricted cash	504	503
Other assets	128	125
Land under development	14,573	19,092
Total assets	16,210	20,182
Debt	865	4,983
Accrued expenses	149	108
Equity	15,196	15,091
Total liabilities and equity	$ 16,210	$ 20,182