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Employee benefit plans - Summary of Amounts Recognised in the Income Statement (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Disclosure of net defined benefit liability (asset) [line items] |  |
Current service cost | $ 2,353 | $ 3,204
Interest cost | 2,116 | 2,005
Past service cost | 97 | 146
Loss on settlement | 32 | 0
Expected return on plan assets | (1,881) | (1,800)
Employee benefit plans expense (recovery) | 2,717 | 3,555
Employee Benefit Plan |  |
Disclosure of net defined benefit liability (asset) [line items] |  |
Current service cost | 2,181 | 2,935
Interest cost | 669 | 601
Past service cost | 0 | 0
Loss on settlement | 0 | 0
Expected return on plan assets | (72) | (73)
Employee benefit plans expense (recovery) | 2,778 | 3,463
SERP |  |
Disclosure of net defined benefit liability (asset) [line items] |  |
Current service cost | 172 | 269
Interest cost | 1,447 | 1,404
Past service cost | 97 | 146
Loss on settlement | 32 | 0
Expected return on plan assets | (1,809) | (1,727)
Employee benefit plans expense (recovery) | $ (61) | $ 92

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- Definition Expected return on plan assets net defined benefit liability asset recognised in profit or loss. + References No definition available. + Details
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- Definition Losses arising from settlements recognised in profit or loss + References No definition available. + Details
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- Definition Net interest expense (income) defined benefit liability asset recognized in profit or loss. + References No definition available. + Details
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- Definition The amount of post-employment benefit expense relating to defined benefit plans. [Refer: Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2018-01-01 -Paragraph 5 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_5&doctype=Standard -URIDate 2018-03-16 + Details
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- Details
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