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Financial risk management (Details 1) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Financial risk management [Line Items] |  |
Bank borrowings | $ 83,760 | $ 164,780
Unsecured obligations | 1,598,730 | 1,321,640
Subtotal | 69,170 | 163,568
Hedging liabilities | 50,430 | 9,140
Derivative financial instruments | 160 | 800
Subtotal | 50,590 | 9,940
Trade accounts payable and other accounts payable | 163,751 | 196,280
Total | 1,733,080 | 1,496,360
LaterThanOneYear [Member] |  |
Financial risk management [Line Items] |  |
Bank borrowings | 4,100 | 164,780
Unsecured obligations | 61,370 | 47,450
Subtotal | 65,470 | 212,230
Hedging liabilities | 5,520 | 37,010
Derivative financial instruments | 160 | 800
Subtotal | 5,680 | 37,810
Trade accounts payable and other accounts payable | 163,170 | 196,180
Total | 234,320 | 446,220
Later than one year and not later than five years [member] |  |
Financial risk management [Line Items] |  |
Bank borrowings | 79,660 | 0
Unsecured obligations | 823,760 | 522,520
Subtotal | 903,420 | 522,520
Hedging liabilities | 15,640 | (9,510)
Derivative financial instruments | 0 | 0
Subtotal | 15,640 | (9,510)
Trade accounts payable and other accounts payable | 580 | 100
Total | 919,640 | 513,110
Later than five years [member] |  |
Financial risk management [Line Items] |  |
Bank borrowings | 0 | 0
Unsecured obligations | 713,600 | 751,670
Subtotal | 713,600 | 751,670
Hedging liabilities | 29,270 | (18,360)
Derivative financial instruments | 0 | 0
Subtotal | 29,270 | (18,360)
Trade accounts payable and other accounts payable | 0 | 0
Total | 742,870 | 733,310
Gross carrying amount [member] |  |
Financial risk management [Line Items] |  |
Bank borrowings | 70,250 | 163,570
Unsecured obligations | 1,273,070 | 1,054,890
Subtotal | 1,343,320 | 1,218,460
Hedging liabilities | (14,340) | 2,838,000
Derivative financial instruments | 160 | 80,000
Subtotal | (14,180) | 2,918,000
Trade accounts payable and other accounts payable | 163,750 | 19,628,000
Total | $ 1,492,890 | $ 1,247,640

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- Definition The amount of outstanding funds that the entity is obligated to repay. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_55&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The amount of financial liabilities classified as derivative instruments. [Refer: Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_55&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The amount of derivative financial liabilities held for hedging. [Refer: Derivative financial liabilities] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_55&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to deliver a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Financial instruments, class [member]; Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2018-01-01 -Paragraph 25 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_25&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The amount of loans received from banks that have been secured by collateral. [Refer: Loans received] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_112_c&doctype=Standard -URIDate 2018-03-16 + Details
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