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SELECTED STATEMENTS OF INCOME DATA (Tables)
 12 Months Ended
Dec. 31, 2016
Other Income and Expenses [Abstract]  
Financial Income, Net

Financial income, net:

 

     Year ended December 31,  
     2014      2015      2016  

Interest income

    $ 2,824      $ 2,845      $ 3,300  

Gain (loss) on available-for-sale marketable securities, net

      6        (78 )       (9 ) 

Amortization of premium on available-for-sale marketable securities, net

      (1,121 )       (1,111 )       (1,064 ) 

Foreign exchange loss, net

      (565 )       (490 )       (188 ) 

Accretion of Contingent Consideration

      (169 )       (97 )       —    
  

 

 

     

 

 

     

 

 

  
   $ 975      $ 1,069      $ 2,039