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Product Warranty Reserve (Tables)
3 Months Ended
Mar. 31, 2016
Guarantees [Abstract]  
Roll Forward of Product Warranty Reserve

The following is a rollforward of the product warranty reserve:

 

     Three Months Ended March 31  
     2016      2015  

Beginning of period balance

   $ 714       $ 892   

Additions charged to income

     3         32   

Warranty usage

     (41      (107

Currency translation

     12         (34
  

 

 

    

 

 

 

End of period balance

   $ 688       $ 783