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Equity - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
IFRS Statement [Line Items] |  |  |  |
Par value per share | $ 0.3 | $ 0.3 |  |
Number of shares authorised | 1,000,000,000 | 1,000,000,000 |  |
Accumulated Legal and special reserve | $ 79,931 | $ 79,931 |  |
Proportion of ownership interest in associate | 100.00% |  |  |
Percentage Of Annual Net Income Set Aside As Legal Reserve | 10.00% |  |  |
Issued capital [member] |  |  |  |
IFRS Statement [Line Items] |  |  |  |
Par value per share | $ 0.3 | $ 0.3 |  |
Number of shares outstanding | 347,534,102 | 344,368,062 |  |
Number of shares issued | 356,699,482 | 356,699,482 |  |
Treasury shares [member] |  |  |  |
IFRS Statement [Line Items] |  |  |  |
Number of shares outstanding | (9,166,000) | (12,332,000) | (12,409,000) | (12,492,000)

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