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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, 2017 | Dec. 31, 2016
Disclosure of net defined benefit liability (asset) [line items] |  |
Current service cost | $ 2,979 | $ 2,003
Interest cost | 2,128 | 1,816
Past Service Cost | 414 | 3,687
Expected return on plan assets | (2,070) | (1,904)
Defined benefit plans expense | 3,451 | 5,602
Defined Benefit Pension Plans [member] |  |
Disclosure of net defined benefit liability (asset) [line items] |  |
Current service cost | 2,102 | 520
Interest cost | 620 | 476
Past Service Cost | 206 | 3,494
Expected return on plan assets | (87) | (81)
Defined benefit plans expense | 2,841 | 4,409
Supplemental pension plan [member] |  |
Disclosure of net defined benefit liability (asset) [line items] |  |
Current service cost | 877 | 1,483
Interest cost | 1,508 | 1,340
Past Service Cost | 208 | 193
Expected return on plan assets | (1,983) | (1,823)
Defined benefit plans expense | $ 610 | $ 1,193

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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 2017-01-01 -Paragraph 5 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_5&doctype=Standard -URIDate 2017-03-09 + Details
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- Details
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- Details
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