Segments - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Segment	Sep. 30, 2012
Segment Reporting Information [Line Items]
Business segments			4
General contracting and real estate services revenues	$ 21,896	$ 13,631	$ 63,143	$ 40,655
General contracting and real estate services expenses	20,907	12,707	60,868	38,200
Non-cash stock compensation			1,012
Impairment charges			533
General contracting and real estate services
Segment Reporting Information [Line Items]
General contracting and real estate services revenues	21,896	13,631	63,143	40,655
General contracting and real estate services expenses	20,907	12,707	60,868	38,200
General and Administrative Expense
Segment Reporting Information [Line Items]
Non-cash stock compensation	200		1,000
Intersegment Eliminations | General contracting and real estate services
Segment Reporting Information [Line Items]
General contracting and real estate services revenues	13,300	200	18,900	1,000
General contracting and real estate services expenses	$ 13,100	$ 200	$ 18,700	$ 1,000