Significant Accounting Policies - Summary of Warranty Provision (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Accounting Policies [Abstract]
Balance — Beginning of the year	$ 4,438	$ 4,529
Provision for new warranty claims	5,878	3,285
Change in provision for preexisting warranty claims	(467)	563
Deduction for payments made	(2,192)	(3,900)
Currency translation adjustment	(77)	(39)
Balance — End of year	$ 7,580	$ 4,438