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Earnings per share ("EPS") (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Components of calculation of basic EPS and diluted EPS [Abstract] |  |  |
Profit/(loss) for the period used for calculation of EPS - basic | $ 266,266 | $ 73,679 | $ (46,927)
Interest and amortization on the convertible notes | 6,766 | 12,177 | 0
Profit/(loss) for the period used for calculation of EPS - dilutive | $ 273,032 | $ 85,856 | $ (46,927)
Basic earnings per share [Abstract] |  |  |
Weighted average number of shares (basic) (in shares) | 155,712,886 | 143,437,164 | 143,429,610
Diluted earnings per share [Abstract] |  |  |
Weighted average shares outstanding - basic (in shares) | 155,712,886 | 143,437,164 | 143,429,610
Dilutive equity awards (in shares) | 65,873 | 133,342 | 5,311
Dilutive shares related to convertible notes (in shares) | 14,275,217 | 24,589,370 | 0
Weighted average shares outstanding - dilutive (in shares) | 170,053,975 | 168,159,876 | 143,434,921

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- Definition The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2020-01-01 -Paragraph 70 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=33&code=ifrs-tx-2020-en-r&anchor=para_70_b&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The number of dilutive potential ordinary shares that relate to the assumed conversion of the entity's convertible instruments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 33 -IssueDate 2020-01-01 -Paragraph 70 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=33&code=ifrs-tx-2020-en-r&anchor=para_70_b&doctype=Standard -URIDate 2020-01-01 + Details
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