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Investment in associate - Statements of income (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Disclosure of associates [line items] |  |
Revenue | $ 2,649,963 | $ 3,283,514
Operating income (loss) | (52,450) | 189,450
Income tax expense | 62,105 | (4,474)
Net income (loss) | (125,327) | 116,366
Atlas Methanol Company Unlimited |  |
Disclosure of associates [line items] |  |
Net income (loss) | 29,577 | 52,218
Dividends received from associate | $ 29,026 | $ 56,159
Percentage of ownership interest in associates | 63.10% | 63.10%
Atlas Methanol Company Unlimited |  |
Disclosure of associates [line items] |  |
Revenue | $ 250,996 | $ 359,425
Cost of sales and depreciation and amortization | (170,714) | (217,333)
Operating income (loss) | 80,282 | 142,092
Finance costs, finance income and other expenses | (10,297) | (11,381)
Income tax expense | (23,112) | (47,957)
Net income (loss) | $ 46,873 | $ 82,754
Ownership rate | 100.00% |

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