Accounts Payable and Accrued Expenses - Summary of Accounts Payable and Accrued Expenses (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Payables And Accruals [Abstract]
Trade accounts payable, including due to subcontractors	$ 62,199	$ 31,882
Compensation and related benefits	7,899	3,475
Accrued interest	185	193
Current portion of earn-out liability	14,757	8,738
Accrued warranty	3,080	936
Other accrued expenses	10,977	8,595
Accounts payable and accrued expenses	$ 99,097	$ 53,819