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Product Warranty Reserve (Tables)
9 Months Ended
Sep. 30, 2014
Guarantees [Abstract]  
Roll Forward of Product Warranty Reserve

The following is a rollforward of the product warranty reserve:

 

     Nine Months Ended
September 30
 
     2014     2013  

Balance at the beginning of period

   $ 1,140      $ 1,229   

Additions charged to income

     205        245   

Warranty usage

     (103     (357

Currency translation

     (11     (32
  

 

 

   

 

 

 

End of period balance

   $ 1,231      $ 1,085