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Accounts Payable and Accrued Expenses - Summary of Accounts Payable and Accrued Expenses (Detail) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Payables And Accruals [Abstract]    
Trade accounts payable, including due to subcontractors $ 57,723 $ 62,199
Compensation and related benefits 6,405 7,899
Current portion of earn-out liability 11,258 14,757
Accrued warranty 2,696 3,080
Other accrued expenses 11,994 11,162
Accounts payable and accrued expenses $ 90,076 $ 99,097