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Defined benefit plans - Summary of Amounts Recognised in the Income Statement (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Disclosure of net defined benefit liability (asset) [line items] |  |
Current service cost | $ 3,204 | $ 2,979
Interest cost | 2,005 | 2,128
Past Service Cost | 146 | 414
Expected return on plan assets | (1,800) | (2,070)
Defined benefit plans expense | 3,555 | 3,451
Defined Benefit Pension Plans [member] |  |
Disclosure of net defined benefit liability (asset) [line items] |  |
Current service cost | 2,935 | 2,102
Interest cost | 601 | 620
Past Service Cost | 0 | 206
Expected return on plan assets | (73) | (87)
Defined benefit plans expense | 3,463 | 2,841
Supplemental pension plan [member] |  |
Disclosure of net defined benefit liability (asset) [line items] |  |
Current service cost | 269 | 877
Interest cost | 1,404 | 1,508
Past Service Cost | 146 | 208
Expected return on plan assets | (1,727) | (1,983)
Defined benefit plans expense | $ 92 | $ 610

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- Definition Current service costs Recognised in Profit or Loss + References No definition available. + Details
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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 Net interest expense (income) defined benefit liability asset recognized in profit or loss. + References No definition available. + Details
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- Definition Past service costs recognised in profit or loss. + References No definition available. + Details
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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 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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- Details
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