Accounts Payable and Accrued Expenses - Summary of Accounts Payable and Accrued Expenses (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Payables And Accruals [Abstract]
Trade accounts payable	$ 58,985	$ 62,199
Compensation and related benefits	8,232	7,899
Current portion of earn-out liability	13,527	14,757
Accrued warranty	2,684	3,080
Other accrued expenses	12,182	11,162
Accounts payable and accrued expenses	$ 95,610	$ 99,097