Significant Accounting Policies - Summary of Warranty Provision (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance — Beginning of the year	$ 7,580	$ 4,438
Provision for new warranty claims	1,798	5,878
Change in provision for preexisting warranty claims	389	(467)
Deduction for payments made	(3,819)	(2,192)
Currency translation adjustment	(396)	(77)
Balance — End of year	$ 5,552	$ 7,580