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Product Warranty Reserve (Tables)
12 Months Ended
Dec. 31, 2014
Guarantees [Abstract]  
Roll Forward of Product Warranty Reserve

The following is a rollforward of the product warranty reserve:

 

     2014      2013      2012  

Balance at January 1

   $ 1,140       $ 1,229       $ 824   

Additions charged to income

     (45      443         1,384   

Warranty usage

     (133      (475      (983

Currency translation

     (70      (57      4   
  

 

 

    

 

 

    

 

 

 

Balance at December 31

$ 892    $ 1,140    $ 1,229