Reconciliation of Changes in Accrued Warranty Costs (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Accounting Policies [Abstract]
Balance at beginning of year	$ 5,221	$ 10,308
Warranty claims paid or retired	(1,654)	(1,102)
Reversal of previously recorded liability		(3,744)
Expense	1,339	555
Adjustment due to currency translation	(348)	(796)
Balance at end of year	$ 4,558	$ 5,221