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Share-based payment arrangements - Summary of share-based payments expense (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Expense from share-based payment transactions | $ 10,692 | $ 10,396
Share options |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Expense from share-based payment transactions | 3,347 | 3,128
Restricted share units with no performance criteria |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Expense from share-based payment transactions | 1,305 | 1,600
Restricted share units with performance criteria |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Expense from share-based payment transactions | 2,556 | 1,195
Deferred units |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Expense from share-based payment transactions | 2,270 | 2,209
Performance share units |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Expense from share-based payment transactions | $ 1,214 | $ 2,264

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount of expense from share-based payment transactions with employees. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard -URIDate 2020-01-01 + Details
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- Details
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- Details
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- Details
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