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Financial instruments (Details 30) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financial instruments [Line Items]
Financial liabilities	$ 3,088,270	$ 2,516,460
Level 1 of fair value hierarchy [member] | Bank loans [Member]
Financial instruments [Line Items]
Financial liabilities	0	0
Level 1 of fair value hierarchy [member] | Forwards [Member]
Financial instruments [Line Items]
Financial liabilities	0	0
Level 1 of fair value hierarchy [member] | Options [Member]
Financial instruments [Line Items]
Financial assets	0
Financial liabilities		0
Level 1 of fair value hierarchy [member] | Hedging Swaps [Member]
Financial instruments [Line Items]
Financial liabilities	0
Level 1 of fair value hierarchy [member] | Inversions Swaps [Member]
Financial instruments [Line Items]
Financial liabilities	0
Level 1 of fair value hierarchy [member] | Unsecured obligations [Member]
Financial instruments [Line Items]
Financial liabilities	0	0
Level 1 of fair value hierarchy [member] | Unsecured obligations [Member]
Financial instruments [Line Items]
Financial liabilities	0	0
Level 1 of fair value hierarchy [member] | Non-current hedging liabilities [Member]
Financial instruments [Line Items]
Financial liabilities	0	0
Level 1 of fair value hierarchy [member] | Current Lease Liabilities [Member]
Financial instruments [Line Items]
Financial liabilities	0	0
Level 1 of fair value hierarchy [member] | Noncurrent Lease Liabilities [Member]
Financial instruments [Line Items]
Financial liabilities	0	0
Level 2 of fair value hierarchy [member] | Bank loans [Member]
Financial instruments [Line Items]
Financial liabilities	82	199
Level 2 of fair value hierarchy [member] | Forwards [Member]
Financial instruments [Line Items]
Financial liabilities	4,614	2,837
Level 2 of fair value hierarchy [member] | Options [Member]
Financial instruments [Line Items]
Financial assets	780
Financial liabilities		289
Level 2 of fair value hierarchy [member] | Hedging Swaps [Member]
Financial instruments [Line Items]
Financial liabilities	5,695
Level 2 of fair value hierarchy [member] | Inversions Swaps [Member]
Financial instruments [Line Items]
Financial liabilities	21,004
Level 2 of fair value hierarchy [member] | Unsecured obligations [Member]
Financial instruments [Line Items]
Financial liabilities	36,781	280,578
Level 2 of fair value hierarchy [member] | Bank loans [Member]
Financial instruments [Line Items]
Financial liabilities	71,029	71,033
Level 2 of fair value hierarchy [member] | Unsecured obligations [Member]
Financial instruments [Line Items]
Financial liabilities	2,355,943	1,658,506
Level 2 of fair value hierarchy [member] | Non-current hedging liabilities [Member]
Financial instruments [Line Items]
Financial liabilities	13,511	16,477
Level 2 of fair value hierarchy [member] | Current Lease Liabilities [Member]
Financial instruments [Line Items]
Financial liabilities	5,528	7,694
Level 2 of fair value hierarchy [member] | Noncurrent Lease Liabilities [Member]
Financial instruments [Line Items]
Financial liabilities	26,027	33,187
Level 3 of fair value hierarchy [member] | Bank loans [Member]
Financial instruments [Line Items]
Financial liabilities	0	0
Level 3 of fair value hierarchy [member] | Forwards [Member]
Financial instruments [Line Items]
Financial liabilities	0	0
Level 3 of fair value hierarchy [member] | Options [Member]
Financial instruments [Line Items]
Financial assets	0
Financial liabilities		0
Level 3 of fair value hierarchy [member] | Hedging Swaps [Member]
Financial instruments [Line Items]
Financial liabilities	0
Level 3 of fair value hierarchy [member] | Inversions Swaps [Member]
Financial instruments [Line Items]
Financial liabilities	0
Level 3 of fair value hierarchy [member] | Unsecured obligations [Member]
Financial instruments [Line Items]
Financial liabilities	0	0
Level 3 of fair value hierarchy [member] | Bank loans [Member]
Financial instruments [Line Items]
Financial liabilities	0	0
Level 3 of fair value hierarchy [member] | Unsecured obligations [Member]
Financial instruments [Line Items]
Financial liabilities	0	0
Level 3 of fair value hierarchy [member] | Non-current hedging liabilities [Member]
Financial instruments [Line Items]
Financial liabilities	0	0
Level 3 of fair value hierarchy [member] | Current Lease Liabilities [Member]
Financial instruments [Line Items]
Financial liabilities	0	0
Level 3 of fair value hierarchy [member] | Noncurrent Lease Liabilities [Member]
Financial instruments [Line Items]
Financial liabilities	0	0
Fair value Informative [Member] | Bank loans [Member]
Financial instruments [Line Items]
Financial liabilities	82	199
Fair value Informative [Member] | Forwards [Member]
Financial instruments [Line Items]
Financial liabilities	0	0
Fair value Informative [Member] | Options [Member]
Financial instruments [Line Items]
Financial assets	0
Financial liabilities		0
Fair value Informative [Member] | Hedging Swaps [Member]
Financial instruments [Line Items]
Financial liabilities	0
Fair value Informative [Member] | Inversions Swaps [Member]
Financial instruments [Line Items]
Financial liabilities	0
Fair value Informative [Member] | Unsecured obligations [Member]
Financial instruments [Line Items]
Financial liabilities	36,781	280,578
Fair value Informative [Member] | Bank loans [Member]
Financial instruments [Line Items]
Financial liabilities	71,029	71,033
Fair value Informative [Member] | Unsecured obligations [Member]
Financial instruments [Line Items]
Financial liabilities	2,355,943	1,658,506
Fair value Informative [Member] | Non-current hedging liabilities [Member]
Financial instruments [Line Items]
Financial liabilities	0	0
Fair value Informative [Member] | Current Lease Liabilities [Member]
Financial instruments [Line Items]
Financial liabilities	5,528	7,694
Fair value Informative [Member] | Noncurrent Lease Liabilities [Member]
Financial instruments [Line Items]
Financial liabilities	26,027	33,187
Fair Value [Member] | Bank loans [Member]
Financial instruments [Line Items]
Financial liabilities	0	0
Fair Value [Member] | Forwards [Member]
Financial instruments [Line Items]
Financial liabilities	4,614	2,837
Fair Value [Member] | Options [Member]
Financial instruments [Line Items]
Financial assets	780
Financial liabilities		289
Fair Value [Member] | Hedging Swaps [Member]
Financial instruments [Line Items]
Financial liabilities	5,695
Fair Value [Member] | Inversions Swaps [Member]
Financial instruments [Line Items]
Financial liabilities	21,004
Fair Value [Member] | Unsecured obligations [Member]
Financial instruments [Line Items]
Financial liabilities	0	0
Fair Value [Member] | Bank loans [Member]
Financial instruments [Line Items]
Financial liabilities	0	0
Fair Value [Member] | Unsecured obligations [Member]
Financial instruments [Line Items]
Financial liabilities	0	0
Fair Value [Member] | Non-current hedging liabilities [Member]
Financial instruments [Line Items]
Financial liabilities	13,511	16,477
Fair Value [Member] | Current Lease Liabilities [Member]
Financial instruments [Line Items]
Financial liabilities	0	0
Fair Value [Member] | Noncurrent Lease Liabilities [Member]
Financial instruments [Line Items]
Financial liabilities	0	0
Gross carrying amount [member]
Financial instruments [Line Items]
Financial liabilities	2,222,770	2,037,820
Gross carrying amount [member] | Bank loans [Member]
Financial instruments [Line Items]
Financial liabilities	82	199
Gross carrying amount [member] | Forwards [Member]
Financial instruments [Line Items]
Financial liabilities	0	0
Gross carrying amount [member] | Options [Member]
Financial instruments [Line Items]
Financial assets	0
Financial liabilities		0
Gross carrying amount [member] | Hedging Swaps [Member]
Financial instruments [Line Items]
Financial liabilities	0
Gross carrying amount [member] | Inversions Swaps [Member]
Financial instruments [Line Items]
Financial liabilities	0
Gross carrying amount [member] | Unsecured obligations [Member]
Financial instruments [Line Items]
Financial liabilities	36,781	280,578
Gross carrying amount [member] | Bank loans [Member]
Financial instruments [Line Items]
Financial liabilities	69,376	69,138
Gross carrying amount [member] | Unsecured obligations [Member]
Financial instruments [Line Items]
Financial liabilities	1,816,626	1,403,108
Gross carrying amount [member] | Non-current hedging liabilities [Member]
Financial instruments [Line Items]
Financial liabilities	0	0
Gross carrying amount [member] | Current Lease Liabilities [Member]
Financial instruments [Line Items]
Financial liabilities	5,528	7,694
Gross carrying amount [member] | Noncurrent Lease Liabilities [Member]
Financial instruments [Line Items]
Financial liabilities	25,546	30,203
Cash and cash equivalents [Member] | Level 1 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial assets	0	0
Cash and cash equivalents [Member] | Level 2 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial assets	509,102	588,530
Cash and cash equivalents [Member] | Level 3 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial assets	0	0
Cash and cash equivalents [Member] | Fair value Informative [Member]
Financial instruments [Line Items]
Financial assets	509,102	588,530
Cash and cash equivalents [Member] | Fair Value [Member]
Financial instruments [Line Items]
Financial assets	0	0
Cash and cash equivalents [Member] | Gross carrying amount [member]
Financial instruments [Line Items]
Financial assets	509,102	588,530
Time deposits [Member] | Level 1 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial assets	0	0
Time deposits [Member] | Level 2 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial assets	345,459	485,689
Time deposits [Member] | Level 3 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial assets	0	0
Time deposits [Member] | Fair value Informative [Member]
Financial instruments [Line Items]
Financial assets	345,459	485,689
Time deposits [Member] | Fair Value [Member]
Financial instruments [Line Items]
Financial assets	0	0
Time deposits [Member] | Gross carrying amount [member]
Financial instruments [Line Items]
Financial assets	345,459	485,689
Derivative instruments [Member] | Level 1 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial assets	0	0
Financial liabilities		0
Derivative instruments [Member] | Level 2 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial assets	0	0
Financial liabilities		0
Derivative instruments [Member] | Level 3 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial assets	0	0
Financial liabilities		0
Derivative instruments [Member] | Fair value Informative [Member]
Financial instruments [Line Items]
Financial assets	0	0
Financial liabilities		0
Derivative instruments [Member] | Fair Value [Member]
Financial instruments [Line Items]
Financial assets	0	0
Financial liabilities		0
Derivative instruments [Member] | Gross carrying amount [member]
Financial instruments [Line Items]
Financial assets	0	0
Financial liabilities		0
Forwards [Member] | Level 1 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial assets	0	0
Forwards [Member] | Level 2 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial assets	2,263	2,420
Forwards [Member] | Level 3 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial assets	0	0
Forwards [Member] | Fair value Informative [Member]
Financial instruments [Line Items]
Financial assets	0
Forwards [Member] | Fair Value [Member]
Financial instruments [Line Items]
Financial assets	2,263	2,420
Forwards [Member] | Gross carrying amount [member]
Financial instruments [Line Items]
Financial assets	0	0
Options [Member] | Level 1 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial assets	0	0
Options [Member] | Level 2 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial assets	347	111
Options [Member] | Level 3 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial assets	0	0
Options [Member] | Fair value Informative [Member]
Financial instruments [Line Items]
Financial assets	0	0
Options [Member] | Fair Value [Member]
Financial instruments [Line Items]
Financial assets	347	111
Options [Member] | Gross carrying amount [member]
Financial instruments [Line Items]
Financial assets	0	0
Hedging assets [Member] | Level 1 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial assets	0	0
Hedging assets [Member] | Level 2 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial assets	37,276	3,918
Hedging assets [Member] | Level 3 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial assets	0	0
Hedging assets [Member] | Fair value Informative [Member]
Financial instruments [Line Items]
Financial assets	0	0
Hedging assets [Member] | Fair Value [Member]
Financial instruments [Line Items]
Financial assets	37,276	3,918
Hedging assets [Member] | Gross carrying amount [member]
Financial instruments [Line Items]
Financial assets	0	0
Investment Hedge Swaps [Member] | Level 1 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial assets		0
Investment Hedge Swaps [Member] | Level 2 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial assets		17,270
Investment Hedge Swaps [Member] | Level 3 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial assets		0
Investment Hedge Swaps [Member] | Fair value Informative [Member]
Financial instruments [Line Items]
Financial assets		0
Investment Hedge Swaps [Member] | Fair Value [Member]
Financial instruments [Line Items]
Financial assets		17,270
Investment Hedge Swaps [Member] | Gross carrying amount [member]
Financial instruments [Line Items]
Financial assets		0
Non-current accounts receivable [Member] | Level 1 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial assets	0	0
Non-current accounts receivable [Member] | Level 2 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial assets	0	0
Non-current accounts receivable [Member] | Level 3 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial assets	0	0
Non-current accounts receivable [Member] | Fair value Informative [Member]
Financial instruments [Line Items]
Financial assets	11,165	1,710
Non-current accounts receivable [Member] | Fair Value [Member]
Financial instruments [Line Items]
Financial assets	0	0
Non-current accounts receivable [Member] | Gross carrying amount [member]
Financial instruments [Line Items]
Financial assets	11,165	1,710
Others [Member] | Level 1 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial assets	0	0
Others [Member] | Level 2 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial assets	99	94
Others [Member] | Level 3 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial assets	0	0
Others [Member] | Fair value Informative [Member]
Financial instruments [Line Items]
Financial assets	99	94
Others [Member] | Fair Value [Member]
Financial instruments [Line Items]
Financial assets	0	0
Others [Member] | Gross carrying amount [member]
Financial instruments [Line Items]
Financial assets	99	94
Actions [Member] | Level 1 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial assets	14,549	4,785
Actions [Member] | Level 2 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial assets	0	0
Actions [Member] | Level 3 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial assets	0	0
Actions [Member] | Fair value Informative [Member]
Financial instruments [Line Items]
Financial assets	0	0
Actions [Member] | Fair Value [Member]
Financial instruments [Line Items]
Financial assets	14,549	4,785
Actions [Member] | Gross carrying amount [member]
Financial instruments [Line Items]
Financial assets	$ 0	0
Hedging Swaps [Member] | Level 1 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial liabilities		0
Hedging Swaps [Member] | Level 2 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial liabilities		7,183
Hedging Swaps [Member] | Level 3 of fair value hierarchy [member]
Financial instruments [Line Items]
Financial liabilities		0
Hedging Swaps [Member] | Fair value Informative [Member]
Financial instruments [Line Items]
Financial liabilities		0
Hedging Swaps [Member] | Fair Value [Member]
Financial instruments [Line Items]
Financial liabilities		7,183
Hedging Swaps [Member] | Gross carrying amount [member]
Financial instruments [Line Items]
Financial liabilities		$ 0

X

- Definition

The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) 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 receive 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 the entity’s own equity instruments do not include puttable financial instruments 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. [Refer: Financial instruments, class [member]; Financial liabilities]

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X

- 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]]

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