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Product Warranty Reserve (Tables)
9 Months Ended
Sep. 30, 2012
Product Warranty Reserve [Abstract]  
Rollforward of the product warranty reserve

The following is a rollforward of the product warranty reserve:

 

                 
    September 30, 2012     December 31, 2011  

Balance at the beginning of period

  $ 824     $ 536  

Additions charged to income

    1,009       1,968  

Warranty usage

    (649     (1,467

Currency translation

    11       (213
   

 

 

   

 

 

 

End of period balance

  $ 1,195     $ 824