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Goodwill (Tables)
 6 Months Ended
Jun. 30, 2017
Changes to Carrying Amount of Goodwill
The changes to the carrying amount of goodwill as of June 30, 2017 are summarized as follows (in thousands):
 
   
Total
  
Balance, December 31, 2016
  
$
43,208
  
Adjustments to goodwill for foreign currency translation
    
267
  
Balance, June 30, 2017
  
$
43,475