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Product Warranty Reserve (Tables)
6 Months Ended
Jun. 30, 2015
Guarantees [Abstract]  
Roll Forward of Product Warranty Reserve

The following is a rollforward of the product warranty reserve:

 

     Six Months Ended June 30  
     2015      2014  

Beginning of period balance

   $ 892       $ 1,140   

Additions charged to income

     42         155   

Warranty usage

     (139      (75

Currency translation

     (44      20   
  

 

 

    

 

 

 

End of period balance

   $ 751       $ 1,240