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FINANCIAL RISK MANAGEMENT (Details 1) - Fuel-Price Risk [Member] - Fuel Derivative [Member] - USD ($) $ / shares in Units, $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Top of range [member] |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |
Benchmark price (per barrel) | $ 5 | $ 5
Positions effect on equity | $ 1,800 | $ 3,120
Bottom of range [member] |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |
Benchmark price (per barrel) | $ (5) | $ (5)
Positions effect on equity | $ (3,300) | $ (4,780)

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition It represents the benchmark price percentage. + References No definition available. + Details
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- Definition It represents the amount of positions effect on equity. + References No definition available. + Details
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- Details
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- Details
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- Details
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