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Net employee defined benefit - Summary of Expected Contribution Payments to Defined Benefit Plan (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Disclosure of defined benefit plans [line items] |  |
Total expected payments | $ 25,188 | $ 33,226
Up to one year [member] |  |
Disclosure of defined benefit plans [line items] |  |
Total expected payments | 2,299 | 5,169
More than one year but less than five years [member] |  |
Disclosure of defined benefit plans [line items] |  |
Total expected payments | 8,777 | 14,008
Over five years [member] |  |
Disclosure of defined benefit plans [line items] |  |
Total expected payments | $ 14,112 | $ 14,049

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- Definition The estimate of the expected contributions to be made to a defined benefit plan for the next annual reporting period. [Refer: Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 147 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_147_b&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 148 -Subparagraph d -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_148_d_iii&doctype=Standard -URIDate 2020-01-01 + Details
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