Segments - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting Information [Line Items]
General contracting and real estate services revenues	$ (47,066)	$ (20,495)	$ (76,137)	$ (39,729)
General contracting and real estate services expenses	(45,283)	(19,354)	(73,425)	(37,339)
Noncash stock compensation	300	300	800	900
General and Administrative Expenses [Member]
Segment Reporting Information [Line Items]
Noncash stock compensation	200	100	400	300
General Contracting and Real Estate Services [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
General contracting and real estate services revenues	(47,066)	(20,495)	(76,137)	(39,729)
General contracting and real estate services expenses	(45,283)	(19,354)	(73,425)	(37,339)
Noncash stock compensation	100	100	100	200
General Contracting and Real Estate Services [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
General contracting and real estate services revenues	8,000	25,900	16,500	44,600
General contracting and real estate services expenses	$ 8,000	$ 25,500	$ 16,400	$ 44,000