Joint Ventures - Condensed Balance Sheets of Consolidated JV (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Equity Method Investments And Joint Ventures [Abstract]
Cash	$ 2,608	$ 906
Restricted cash	408	505
Other assets	672	833
Land under development	6,120	13,382
Total assets	9,808	15,626
Debt	559	4,574
Accrued expenses	852	935
Equity	8,397	10,117
Total liabilities and equity	$ 9,808	$ 15,626