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Product Warranty Reserve (Tables)
3 Months Ended
Mar. 31, 2015
Guarantees [Abstract]  
Roll Forward of Product Warranty Reserve

The following is a rollforward of the product warranty reserve:

 

     Three Months Ended March 31  
     2015      2014  

Balance at the beginning of period

   $ 892       $ 1,140   

Additions charged to income

     32         98   

Warranty usage

     (107      0   

Currency translation

     (34      (6
  

 

 

    

 

 

 

End of period balance

$ 783    $ 1,232