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Other financial liabilities (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure of financial liabilities [abstract] |
Schedule of other financial liabilities | Other financial liabilities comprise the following at December 31:
|  | 2018 |  | 2017
|  | Non- |  |  |  |  |  | Non- |  |  |  |
|  | Current |  | Current |  | Total |  | Current |  | Current |  | Total
|  | US$'000 |  | US$'000 |  | US$'000 |  | US$'000 |  | US$'000 |  | US$'000
Financial loans from government agencies |  | 9,325 |  | 52,524 |  | 61,849 |  | 10,971 |  | 88,420 |  | 99,391
Derivative financial instruments |  | 23,463 |  | — |  | 23,463 |  | 38,040 |  | — |  | 38,040
Total |  | 32,788 |  | 52,524 |  | 85,312 |  | 49,011 |  | 88,420 |  | 137,431
Schedule of Derivative financial instruments |
|  | 2018 |  | 2017
|  | US$'000 |  | US$'000
Derivatives designated as hedging instruments |  |  |  |
Cross currency swap |  | 15,883 |  | 26,219
Derivatives not designated as hedging instruments |  |  |  |
Cross currency swap |  | 4,501 |  | 7,429
Interest rate swaps |  | 3,079 |  | 4,392
|  | 23,463 |  | 38,040
Schedule of interest rate swaps | The following interest rate swaps were outstanding at December 31:
|  | 2018
|  | Nominal |  |  |  | Fixed |  | Reference |  | Fair
|  | Amount |  |  |  | Interest |  | Floating |  | Value
|  | US$'000 |  | Maturity |  | Rate |  | Interest Rate |  | US$'000
Lease of hydroelectrical installations |  | 137,400 |  | 2022 |  | 2.05 |  | 6-month Euribor |  | (3,079)
Total |  |  |  |  |  |  |  |  |  | (3,079)
|  | 2017
|  | Nominal |  |  |  | Fixed |  | Reference |  | Fair
|  | Amount |  |  |  | Interest |  | Floating |  | Value
|  | US$'000 |  | Maturity |  | Rate |  | Interest Rate |  | US$'000
Lease of hydroelectrical installations |  | 143,916 |  | 2022 |  | 2.05 |  | 6-month Euribor |  | (4,392)
Total |  |  |  |  |  |  |  |  |  | (4,392)

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- Definition Tabular disclosure of outstanding interest rate swaps. + References No definition available. + Details
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- Definition The disclosure of derivative financial instruments. [Refer: Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_10_e&doctype=Standard -URIDate 2018-03-16 + Details
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