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Earnings (loss) per ordinary share (Tables) | 12 Months Ended
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Dec. 31, 2018
Earnings per share [abstract] |
Schedule of earnings (loss) per share calculation |
|  | 2018 |  | 2017 |  | 2016
Basic earnings (loss) per ordinary share computation |  |  |  |  |  |
Numerator: |  |  |  |  |  |
Profit (loss) attributable to the Parent (US$'000) |  | 43,661 |  | (678) |  | (338,427)
Denominator: |  |  |  |  |  |
Weighted average basic shares outstanding |  | 171,406,272 |  | 171,949,128 |  | 171,838,153
Basic earnings (loss) per ordinary share (US$) |  | 0.25 |  | — |  | (1.97)
Diluted earnings (loss) per ordinary share computation |  |  |  |  |  |
Numerator: |  |  |  |  |  |
Profit (loss) attributable to the Parent (US$'000) |  | 43,661 |  | (678) |  | (338,427)
Denominator: |  |  |  |  |  |
Weighted average basic shares outstanding |  | 171,406,272 |  | 171,949,128 |  | 171,838,153
Effect of dilutive securities |  | 123,340 |  | — |  | —
Weighted average dilutive shares outstanding |  | 171,529,612 |  | 171,949,128 |  | 171,838,153
Diluted earnings (loss) per ordinary share (US$) |  | 0.25 |  | — |  | (1.97)

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