Accounts Payable and Accrued Expenses - Summary of Accounts Payable and Accrued Expenses (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Payables And Accruals [Abstract]
Trade accounts payable, including due to subcontractors	$ 50,454	$ 58,985
Compensation and related benefits	5,332	8,232
Current portion of earn-out liability	13,062	13,527	$ 22,565
Accrued warranty	3,373	2,684
Other accrued expenses	9,575	12,182
Accounts payable and accrued expenses	$ 81,796	$ 95,610