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FINANCIAL RISK MANAGEMENT (Details Narrative) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |
Vertical fall in cost of total fuel consumption | $ 135,200 |
Vertical rise in cost of total fuel consumption | 146,500 |
Currency swap contract [Member] |  |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |
Market value | 15,100 |
Currency swap contract [Member] | CLF |  |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |
Notional amount |  | $ 8,700
Fuel-Price Risk [Member] | Fuel options [Member] |  |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |
Recognized gains (losses) | 29,700 | 15,100
Market value | 15,800 | 10,700
Foreign Exchange Rate Risk [Member] | Foreign Forward Instrument [Member] |  |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |
Recognized gains (losses) | $ 18,300 | 9,700
Derivatives to BRL |  | $ 180,000
Interest Rate Risk [Member] |  |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |
Percentage of fixed to fluctuations in interest rate | 60.00% | 63.00%
Interest Rate Risk [Member] | Interest Rate Derivative Contracts [Member] |  |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |
Market value | $ 2,200 | $ 6,600
Liquidity Risk [Member] |  |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |
Liquid funds balance | 1,404,000 | 1,614,000
Undrawn committed credit line | 600,000 | 450,000
Derivative margin guarantees for cash and stand-by letters of credit | $ 5,000 | $ 16,400

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- Definition The fair value of financial instruments designated as hedging instruments. Hedging instruments are designated derivatives or (for a hedge of the risk of changes in foreign currency exchange rates only) designated non-derivative financial assets or non-derivative financial liabilities whose fair value or cash flows are expected to offset changes in the fair value or cash flows of a designated hedged item. [Refer: At fair value [member]; Derivatives [member]; Derivative financial assets; Derivative financial liabilities; Financial instruments, class [member]; Financial assets; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2021-01-01 -Name IFRS -Number 7 -IssueDate 2018-01-01 -Paragraph 22 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-02&anchor=para_22_b&doctype=Standard&book=b -URIDate 2018-03-16 + Details
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