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DERIVATIVE INSTRUMENTS (Narrative) (Details)
₪ in Thousands, $ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2016
Dec. 31, 2016
USD ($)
Jun. 30, 2017
USD ($)
Jun. 30, 2017
ILS (₪)
Dec. 31, 2016
ILS (₪)
Outstanding forward exchange contracts | $   $ 18,890 $ 18,495    
Forward exchange contract remaining maturity 1 year 1 year      
Israel, New Shekels          
Outstanding forward exchange contracts | ₪       ₪ 69,307 ₪ 71,274