Other Current Liabilities - Schedule of Changes in Liability for Product Warranty Claims (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Other Liabilities Disclosure [Abstract]
Balance at beginning of the period	$ 6,912	$ 6,425	$ 6,899	$ 6,625
Satisfaction of warranty claims	(246)	(344)	(1,635)	(1,558)
Provision for warranty claims	619	316	1,898	1,578
Other, primarily impact from changes in foreign currency exchange rates	(190)	231	(67)	(17)
Balance at end of the period	$ 7,095	$ 6,628	$ 7,095	$ 6,628