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Share-based payments - Vesting schedule of SARs (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 MXN ($) EquityInstruments	Dec. 31, 2018 MXN ($) EquityInstruments	Dec. 31, 2017 MXN ($) EquityInstruments
Share-based payments
Forfeited during the year	294,541	121,451
SARs - cash settled
Share-based payments
Shares outstanding	725,193
Forfeited during the year	32,616	484,656	145,769
Cash payment related to key employees related to SARs plan | $	$ 2,395	$ 0	$ 6,021
Vesting / Exercisable within one year | SARs - cash settled
Share-based payments
Shares outstanding	725,193

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- Definition

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- Definition

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

+ References

Reference 1: 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) outstanding in a share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 2
-IssueDate 2019-01-01
-Paragraph 45
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45&doctype=Standard
-URIDate 2019-03-27

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- Definition

The amount of cash payment to key employees related to SARs plan.

+ References

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