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FINANCIAL RISK MANAGEMENT (Details 5) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Assets |  |
Other financial assets, current | $ 3,306,362 | $ 3,745,499
Other financial assets, not current | 14,260,415 | 15,052,473
Liabilities |  |
Other financial liabilities , current | 8,251,249 | 8,688,022
Other financial liabilities, non current | 5,568,752 | 5,842,714
Level 1 [Member] |  |
Assets |  |
Other financial assets, current | 343,218 | 473,653
Other financial assets, not current |  |
Liabilities |  |
Other financial liabilities , current | 7,712 |
Other financial liabilities, non current |  |
Level 2 [Member] |  |
Assets |  |
Other financial assets, current | 23,355 | 62,348
Other financial assets, not current |  | 519
Liabilities |  |
Other financial liabilities , current | 25,921 | 12,200
Other financial liabilities, non current | 340 | 2,617
Level 3 [Member] |  |
Assets |  |
Other financial assets, current |  |
Other financial assets, not current |  |
Liabilities |  |
Other financial liabilities , current |  |
Other financial liabilities, non current |  |
Fair Value Derived Interest Rate [Member] | Level 1 [Member] |  |
Assets |  |
Other financial assets, current |  |
Liabilities |  |
Other financial liabilities , current |  |
Other financial liabilities, non current |  |
Fair Value Derived Interest Rate [Member] | Level 2 [Member] |  |
Assets |  |
Other financial assets, current | 19,460 | 3,113
Liabilities |  |
Other financial liabilities , current | 335 | 8,919
Other financial liabilities, non current |  | 2,617
Fair Value Derived Interest Rate [Member] | Level 3 [Member] |  |
Assets |  |
Other financial assets, current |  |
Liabilities |  |
Other financial liabilities , current |  |
Other financial liabilities, non current |  |
Fuel options [Member] | Level 1 [Member] |  |
Assets |  |
Other financial assets, current |  |
Liabilities |  |
Other financial liabilities , current |  |
Fuel options [Member] | Level 2 [Member] |  |
Assets |  |
Other financial assets, current |  | 10,711
Liabilities |  |
Other financial liabilities , current | 15,678 |
Fuel options [Member] | Level 3 [Member] |  |
Assets |  |
Other financial assets, current |  |
Liabilities |  |
Other financial liabilities , current |  |
Fair Value Of Foreign Currency Derivatives [Member] | Level 1 [Member] |  |
Assets |  |
Other financial assets, current |  |
Other financial assets, not current |  |
Liabilities |  |
Other financial liabilities , current |  |
Fair Value Of Foreign Currency Derivatives [Member] | Level 2 [Member] |  |
Assets |  |
Other financial assets, current | 3,895 | 48,322
Other financial assets, not current |  | 519
Liabilities |  |
Other financial liabilities , current | 7,587 | 2,092
Fair Value Of Foreign Currency Derivatives [Member] | Level 3 [Member] |  |
Assets |  |
Other financial assets, current |  |
Other financial assets, not current |  |
Liabilities |  |
Other financial liabilities , current |  |
Cash And Cash Equivalents [Member] | Level 1 [Member] |  |
Assets |  |
Other financial assets, current | 43,653 | 29,658
Cash And Cash Equivalents [Member] | Level 2 [Member] |  |
Assets |  |
Other financial assets, current |  |
Cash And Cash Equivalents [Member] | Level 3 [Member] |  |
Assets |  |
Other financial assets, current |  |
Short-Term Mutual Funds [Member] | Level 1 [Member] |  |
Assets |  |
Other financial assets, current | 43,653 | 29,658
Short-Term Mutual Funds [Member] | Level 2 [Member] |  |
Assets |  |
Other financial assets, current |  |
Short-Term Mutual Funds [Member] | Level 3 [Member] |  |
Assets |  |
Other financial assets, current |  |
Interest Accrued Since The Last Payment Date Of Cross Currency Swap [Member] | Level 1 [Member] |  |
Assets |  |
Other financial assets, current |  |
Liabilities |  |
Other financial liabilities , current |  |
Other financial liabilities, non current |  |
Interest Accrued Since The Last Payment Date Of Cross Currency Swap [Member] | Level 2 [Member] |  |
Assets |  |
Other financial assets, current |  | 202
Liabilities |  |
Other financial liabilities , current | 2,321 | 1,189
Other financial liabilities, non current | 340 |
Interest Accrued Since The Last Payment Date Of Cross Currency Swap [Member] | Level 3 [Member] |  |
Assets |  |
Other financial assets, current |  |
Liabilities |  |
Other financial liabilities , current |  |
Other financial liabilities, non current |  |
Derivative Not Recognized As A Hedge [Member] | Level 1 [Member] |  |
Assets |  |
Other financial assets, current | 19,396 |
Liabilities |  |
Other financial liabilities , current | 7,712 |
Derivative Not Recognized As A Hedge [Member] | Level 2 [Member] |  |
Assets |  |
Other financial assets, current |  |
Liabilities |  |
Other financial liabilities , current |  |
Derivative Not Recognized As A Hedge [Member] | Level 3 [Member] |  |
Assets |  |
Other financial assets, current |  |
Liabilities |  |
Other financial liabilities , current |  |
Other financial liabilities, non current |  |
Private Investment Funds [Member] | Level 1 [Member] |  |
Assets |  |
Other financial assets, current | 322,428 | 472,232
Private Investment Funds [Member] | Level 2 [Member] |  |
Assets |  |
Other financial assets, current |  |
Private Investment Funds [Member] | Level 3 [Member] |  |
Assets |  |
Other financial assets, current |  |
Domestic And Foreign Bonds [Member] | Level 1 [Member] |  |
Assets |  |
Other financial assets, current | 1,394 | 1,421
Domestic And Foreign Bonds [Member] | Level 2 [Member] |  |
Assets |  |
Other financial assets, current |  |
Domestic And Foreign Bonds [Member] | Level 3 [Member] |  |
Assets |  |
Other financial assets, current |  |
Fair Value [Member] |  |
Assets |  |
Other financial assets, current |  | 536,001
Other financial assets, not current |  | 519
Liabilities |  |
Other financial liabilities , current | 33,633 | 12,200
Other financial liabilities, non current | 340 | 2,617
Fair Value [Member] | Fair Value Derived Interest Rate [Member] |  |
Assets |  |
Other financial assets, current | 19,460 | 3,113
Liabilities |  |
Other financial liabilities , current | 335 | 8,919
Other financial liabilities, non current |  | 2,617
Fair Value [Member] | Fuel options [Member] |  |
Assets |  |
Other financial assets, current |  | 10,711
Liabilities |  |
Other financial liabilities , current | 15,678 |
Fair Value [Member] | Fair Value Of Foreign Currency Derivatives [Member] |  |
Assets |  |
Other financial assets, current | 3,895 | 48,322
Other financial assets, not current |  | 519
Liabilities |  |
Other financial liabilities , current | 7,587 | 2,092
Fair Value [Member] | Cash And Cash Equivalents [Member] |  |
Assets |  |
Other financial assets, current | 43,653 | 29,658
Fair Value [Member] | Short-Term Mutual Funds [Member] |  |
Assets |  |
Other financial assets, current | 43,653 | 29,658
Fair Value [Member] | Interest Accrued Since The Last Payment Date Of Cross Currency Swap [Member] |  |
Assets |  |
Other financial assets, current |  | 202
Liabilities |  |
Other financial liabilities , current | 2,321 | 1,189
Other financial liabilities, non current |  |
Fair Value [Member] | Derivative Not Recognized As A Hedge [Member] |  |
Assets |  |
Other financial assets, current | 19,396 |
Liabilities |  |
Other financial liabilities , current | 7,712 |
Other financial liabilities, non current | 340 |
Fair Value [Member] | Private Investment Funds [Member] |  |
Assets |  |
Other financial assets, current | 322,428 | 472,232
Fair Value [Member] | Domestic And Foreign Bonds [Member] |  |
Assets |  |
Other financial assets, current | $ 1,394 | $ 1,421

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