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Employee Benefit - Maturity Profile of Defined Benefit Obligation (Detail) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 USD ($) yr | Dec. 31, 2017 USD ($) yr
Disclosure of defined benefit plans [Line Items] |  |
Expected payments | $ 24,500 | $ 21,068
Weighted average duration of defined benefit obligation | yr | 10 | 11
Top of range [Member] |  |
Disclosure of defined benefit plans [Line Items] |  |
Weighted average duration of defined benefit obligation | yr | 11 |
Within one year [Member] |  |
Disclosure of defined benefit plans [Line Items] |  |
Expected payments | $ 855 | $ 877
Between 2 and 5 years [Member] |  |
Disclosure of defined benefit plans [Line Items] |  |
Expected payments | 2,374 | 1,616
Between 6 and 10 years [Member] |  |
Disclosure of defined benefit plans [Line Items] |  |
Expected payments | 4,187 | 3,183
Beyond 10 years [Member] |  |
Disclosure of defined benefit plans [Line Items] |  |
Expected payments | $ 17,084 | $ 15,392

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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 2018-01-01 -Paragraph 147 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_147_b&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2018-01-01 -Paragraph 148 -Subparagraph d -Clause iii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_148_d_iii&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The weighted average duration of a defined benefit obligation. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2018-01-01 -Paragraph 147 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_147_c&doctype=Standard -URIDate 2018-03-16 + Details
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