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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 |  |  |

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