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DERIVATIVES AND HEDGING ACTIVITIES (Tables)
 12 Months Ended
Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Fair Value of Outstanding Derivative Instruments

The fair value of the Company’s outstanding derivative instruments is as follows:

 

     As at
December 31,		  
     2016      2017  

Derivative assets:

      

Derivatives designated as cash flow hedging instruments:

      

Foreign exchange forward contracts

    $ 6      $ —    
  

 

 

     

 

 

  

Total

    $ 6      $ —    
  

 

 

     

 

 

  
Increase in Unrealized Gains Recognized in "Accumulated Other Comprehensive Income (Loss)" on Derivatives, Before Tax Effect

The increase in unrealized gains recognized in “accumulated other comprehensive income (loss)” on derivatives, before tax effect, is as follows:

 

     Year ended December 31,  
     2015      2016      2017  

Derivatives designated as cash flow hedging instruments:

         

Foreign exchange option contracts

    $ 83      $ 67      $ 90  

Foreign exchange forward contracts

      94        91        93  
  

 

 

     

 

 

     

 

 

  
   $ 177      $ 158      $ 183  
  

 

 

     

 

 

     

 

 

  
Net Gains Reclassified from "Accumulated Other Comprehensive Income (Loss)"

The net gains reclassified from “accumulated other comprehensive income (loss)” into income, are as follows:

 

     Year ended December 31,  
     2015      2016      2017  

Derivatives designated as cash flow hedging instruments:

         

Foreign exchange option contracts

    $ (31 )     $ (67 )     $ (90 ) 

Foreign exchange forward contracts

      (73 )       (94 )       (99 ) 
  

 

 

     

 

 

     

 

 

  
   $ (104 )     $ (161 )     $ (189 )