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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Financial Assets and Liabilities by Category (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Disclosure of financial liabilities [line items] |  |
Financial liabilities | $ 288,948 | $ 280,307
Disclosure of financial assets [line items] |  |
Financial assets | 611,112 | 525,777
Trade and other payables |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 55,768 | 60,253
Debt |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 233,180 | 220,054
Cash and cash equivalents |  |
Disclosure of financial assets [line items] |  |
Financial assets | 459,864 | 327,127
Trade and receivables |  |
Disclosure of financial assets [line items] |  |
Financial assets | 14,848 | 35,590
Marketable securities |  |
Disclosure of financial assets [line items] |  |
Financial assets | 114,001 | 148,944
Other financial assets |  |
Disclosure of financial assets [line items] |  |
Financial assets | 22,399 | 14,116
Amortized cost |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 278,939 | 268,137
Amortized cost | Trade and other payables |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 45,759 | 48,083
Amortized cost | Debt |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 233,180 | 220,054
FVTPL |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 10,009 | 12,170
FVTPL | Trade and other payables |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 10,009 | 12,170
FVTPL | Debt |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 0 | 0
FVTOCI |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 0 | 0
FVTOCI | Trade and other payables |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 0 | 0
FVTOCI | Debt |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 0 | 0
Amortized cost |  |
Disclosure of financial assets [line items] |  |
Financial assets | 14,773 | 7,152
Amortized cost | Cash and cash equivalents |  |
Disclosure of financial assets [line items] |  |
Financial assets | 0 | 0
Amortized cost | Trade and receivables |  |
Disclosure of financial assets [line items] |  |
Financial assets | 0 | 0
Amortized cost | Marketable securities |  |
Disclosure of financial assets [line items] |  |
Financial assets | 0 | 0
Amortized cost | Other financial assets |  |
Disclosure of financial assets [line items] |  |
Financial assets | 14,773 | 7,152
FVTPL |  |
Disclosure of financial assets [line items] |  |
Financial assets | 482,338 | 369,681
FVTPL | Cash and cash equivalents |  |
Disclosure of financial assets [line items] |  |
Financial assets | 459,864 | 327,127
FVTPL | Trade and receivables |  |
Disclosure of financial assets [line items] |  |
Financial assets | 14,848 | 35,590
FVTPL | Marketable securities |  |
Disclosure of financial assets [line items] |  |
Financial assets | 0 | 0
FVTPL | Other financial assets |  |
Disclosure of financial assets [line items] |  |
Financial assets | 7,626 | 6,964
FVTOCI |  |
Disclosure of financial assets [line items] |  |
Financial assets | 114,001 | 148,944
FVTOCI | Cash and cash equivalents |  |
Disclosure of financial assets [line items] |  |
Financial assets | 0 | 0
FVTOCI | Trade and receivables |  |
Disclosure of financial assets [line items] |  |
Financial assets | 0 | 0
FVTOCI | Marketable securities |  |
Disclosure of financial assets [line items] |  |
Financial assets | 114,001 | 148,944
FVTOCI | Other financial assets |  |
Disclosure of financial assets [line items] |  |
Financial assets | $ 0 | $ 0

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- 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] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 25 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_25&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2018-01-01 -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 35H -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_35H&doctype=Standard -URIDate 2017-03-09 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2018-01-01 -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 35I -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_35I&doctype=Standard -URIDate 2017-03-09 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2018-01-01 -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 35M -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_35M&doctype=Standard -URIDate 2017-03-09 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Note Effective 2018-01-01 -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 35N -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_35N&doctype=Standard -URIDate 2017-03-09 + 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 2017-01-01 -Paragraph 25 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_25&doctype=Standard -URIDate 2017-03-09 + Details
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