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DEBENTURES (Narrative) (Details)
$ / shares in Units, ₪ in Thousands, $ in Thousands
1 Months Ended 12 Months Ended
Jun. 30, 2016
USD ($)
Dec. 31, 2017
USD ($)
item
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2017
ILS (₪)
Mar. 31, 2014
USD ($)
$ / shares
Debt Instrument [Line Items]            
Proceeds from non-convertible debentures   $ 55,960 $ 70,592    
Debentures Series G [Member]            
Debt Instrument [Line Items]            
Proceeds from non-convertible debentures $ 115,000          
Principal amount   $ 135,000        
Interest rate   2.79%     2.79%  
Number of installment payments | item   7        
Hedging transactions asset fair value   $ 16,455        
Debentures Series G [Member] | Israel, New Shekels INS [Member]            
Debt Instrument [Line Items]            
Principal amount | ₪         ₪ 468,000  
Jazz's Notes [Member]            
Debt Instrument [Line Items]            
Outstanding principal   $ 58,000        
Principal amount           $ 45,000
Interest rate   8.00%     8.00%  
Conversion ratio per share | $ / shares           $ 10.07
Repurchase amount           $ 10,000
Redemption premium (as a percent)   1.00%        
Debentures Series D [Member]            
Debt Instrument [Line Items]            
Outstanding principal     5,977      
Debentures Series F [Member]            
Debt Instrument [Line Items]            
Outstanding principal     $ 238