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Employee Benefit - Sensitivity Analysis of One-percentage Point Change in Assumed Rates (Detail) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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Discount rate [Member] |  |
Disclosure of sensitivity analysis for actuarial assumptions [Line Items] |  |
Assumption - 1% increase | $ (1,003) | $ (777)
Assumption - 1% decrease | 1,178 | 908
Rate of salary increase [Member] |  |
Disclosure of sensitivity analysis for actuarial assumptions [Line Items] |  |
Assumption - 1% increase | 1,115 | 869
Assumption - 1% decrease | $ (973) | $ (762)

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- Definition The increase (decrease) in a defined benefit obligation that would have been caused by a decrease in a significant actuarial assumption that was reasonably possible at the end of the reporting period. [Refer: Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2019-01-01 -Paragraph 145 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2019-en-r&anchor=para_145_a&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The increase (decrease) in a defined benefit obligation that would have been caused by an increase in a significant actuarial assumption that was reasonably possible at the end of the reporting period. [Refer: Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2019-01-01 -Paragraph 145 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2019-en-r&anchor=para_145_a&doctype=Standard -URIDate 2019-03-27 + Details
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