Equity based compensation - Awards Outstanding (Details) - Vermilion incentive plan [Member] - EquityInstruments EquityInstruments in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Disclosure Of Equity Based Compensation [Line Items]
Opening balance	1,931	1,685
Granted	1,193	932
Vested	(688)	(520)
Forfeited	(168)	(166)
Closing balance	2,268	1,931

The number of other equity instruments (ie other than share options) granted in a share-based payment arrangement.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2019-01-01
-Paragraph 47
-Subparagraph b
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-URIDate 2019-03-27

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 2
-IssueDate 2019-01-01
-Paragraph 45
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-URIDate 2019-03-27

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The number of other equity instruments (ie other than share options) exercised or vested in a share-based payment arrangement.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Number 2
-IssueDate 2019-01-01
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The number of other equity instruments (ie other than share options) forfeited in a share-based payment arrangement.

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The number of other equity instruments (ie other than share options) outstanding in a share-based payment arrangement.

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