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Product Warranties (Tables)
3 Months Ended
Mar. 31, 2017
Guarantees [Abstract]  
Product Warranty Activities

Product warranty activities were as follows:

 

     Three Months Ended March 31,  
     2017      2016  

Beginning of period

   $ 8,261      $ 5,205  

Provision for product warranties

     3,014        783  

Direct charges to warranty liability

     (2,857      (984

Foreign currency translation

     67        35  
  

 

 

    

 

 

 

End of period

   $ 8,485      $ 5,039