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Product Warranty Reserve - Roll Forward of Product Warranty Reserve (Detail) (Warranty Reserves [Member], USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Warranty Reserves [Member]
   
Valuation and Qualifying Accounts Disclosure [Line Items]    
Balance at the beginning of period $ 1,140 $ 1,229
Additions charged to income 155 241
Warranty usage (75) (218)
Currency translation 20 (32)
End of period balance $ 1,240 $ 1,220