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Interest income (expense), net (Tables)
3 Months Ended
Mar. 31, 2016
Interest Income (Expense), Net
     Three months ended March 31,  
     2015      2016  

Interest income

   $ 1,196       $ 2,364   

Interest expense

     (10,221      (5,202
  

 

 

    

 

 

 

Interest income (expense), net

   $ (9,025    $ (2,838