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Product Warranty Reserve - Roll Forward of Product Warranty Reserve (Detail) (Warranty Reserves [Member], USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Warranty Reserves [Member]
     
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at the beginning of period $ 1,229 $ 824 $ 536
Additions charged to income 443 1,384 1,968
Warranty usage (475) (983) (1,467)
Currency translation (57) 4 (213)
End of period balance $ 1,140 $ 1,229 $ 824