Joint Ventures - Condensed Balance Sheets of Consolidated JV (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Accounting Policies [Abstract]
Cash	$ 1,159	$ 906
Restricted cash	421	505
Other assets	855	833
Land under development	7,774	13,382
Total assets	10,209	15,626
Debt	1,604	4,574
Accrued expenses	778	935
Equity	7,827	10,117
Total liabilities and equity	$ 10,209	$ 15,626