Crewing costs (Details) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019
Crewing cost [Line Items]
Short term crew benefits (i.e. wages, victualing, insurance)		$ 74,854
Other crew related cost		9,145
Crewing cost		$ 83,999
Crewing cost [Member]
Crewing cost [Line Items]
Short term crew benefits (i.e. wages, victualing, insurance)	$ 87,467
Other crew related cost	8,784
Crewing cost	$ 96,251

The amount of expense from employee benefits (other than termination benefits), which are expected to be settled wholly within twelve months after the end of the annual reporting period in which the employees render the related services, that the entity does not separately disclose in the same statement or note. [Refer: Employee benefits expense]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2019-01-01
-Paragraph 9
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2019-en-r&anchor=para_9&doctype=Standard
-URIDate 2019-03-27

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration