Accounts Payable and Accrued Expenses - Summary of Accounts Payable and Accrued Expenses (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Payables And Accruals [Abstract]
Trade accounts payable, including due to subcontractors	$ 64,581	$ 62,199
Compensation and related benefits	5,841	7,899
Current portion of earn-out liability	18,247	14,757
Accrued warranty	2,743	3,080
Other accrued expenses	12,844	11,162
Accounts payable and accrued expenses	$ 104,256	$ 99,097