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Other assets - Narrative (Details) - USD ($) | Dec. 31, 2019 | Dec. 31, 2018
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Subclassifications of assets, liabilities and equities [abstract] |  |
Restricted cash and cash equivalents | $ 39,413,000 | $ 18,545,000
Restricted cash and cash equivalents for vessels under construction | 0 | 66,452,000
Other current assets | 8,180,000 | $ 60,931,000
Restricted cash, special capital use | 3,300,000 |
Restricted cash, asset held for sale | $ 4,900,000 |

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- Definition The amount in the consolidated financial statements of the assets of the group to which significant restrictions (for example, statutory, contractual and regulatory restrictions) apply on the entity's ability to access or use the assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2019-01-01 -Paragraph 13 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2019-en-r&anchor=para_13_c&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount of current assets that the entity does not separately disclose in the same statement or note. [Refer: Current assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_55&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount of cash and cash equivalents whose use or withdrawal is restricted. [Refer: Cash and cash equivalents] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_55&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition Restricted Cash, Asset Held For Sale + References No definition available. + Details
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- Definition Restricted Cash, Special Capital Use + References No definition available. + Details
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