Other Current Liabilities - Schedule of Changes in Liability for Product Warranty Claims (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Other Liabilities Disclosure [Abstract]
Balance at the beginning of the year	$ 6,625	$ 5,498	$ 5,113
Satisfaction of warranty claims	(1,908)	(2,411)	(2,691)
Provision for warranty claims	2,112	3,399	3,087
Other, primarily impact from changes in foreign currency exchange rates	70	139	(11)
Balance at the end of the year	$ 6,899	$ 6,625	$ 5,498