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Intangible assets - Rollfoward (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets other than goodwill | $ 17,950 | $ 18,083
Additions to and acquisition of intangible assets |  | 3,376
Amortization expense | (2,354) | (2,309)
Disposals | (7,311) |
Impairment charges (note 28) |  | (1,200)
Intangible assets other than goodwill | 8,285 | 17,950
Cost |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets other than goodwill | 69,547 | 66,171
Additions to and acquisition of intangible assets |  | 3,376
Amortization expense | 0 | 0
Disposals | (9,138) |
Impairment charges (note 28) |  | 0
Intangible assets other than goodwill | 60,409 | 69,547
Accumulated amortisation |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Intangible assets other than goodwill | (51,597) | (48,088)
Additions to and acquisition of intangible assets |  | 0
Amortization expense | (2,354) | (2,309)
Disposals | 1,827 |
Impairment charges (note 28) |  | (1,200)
Intangible assets other than goodwill | $ (52,124) | $ (51,597)

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- Definition Additions To And Acquisitions Through Business Combinations, Intangible Assets Other Than Goodwill + References No definition available. + Details
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- Definition The amount of amortisation of intangible assets other than goodwill. [Refer: Depreciation and amortisation expense; Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2017-01-01 -Paragraph 118 -Subparagraph e -Clause vi -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=38&date=2017-03-01&anchor=para_118_e_vi&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The decrease in intangible assets other than goodwill resulting from disposals. [Refer: Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2017-01-01 -Paragraph 118 -Subparagraph e -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=38&date=2017-03-01&anchor=para_118_e_ii&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of impairment loss recognised in profit or loss for intangible assets other than goodwill. [Refer: Impairment loss recognised in profit or loss; Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2017-01-01 -Paragraph 118 -Subparagraph e -Clause iv -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=38&date=2017-03-01&anchor=para_118_e_iv&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of identifiable non-monetary assets without physical substance. This amount does not include goodwill. [Refer: Goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2017-01-01 -Paragraph 118 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=38&date=2017-03-01&anchor=para_118_e&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 54 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_54_c&doctype=Standard -URIDate 2017-03-09 + Details
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