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Critical accounting judgments and key sources of estimation uncertainty: (Details Textual) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure of changes in accounting estimates [abstract]
Expected credit loss rate	15.00%	15.00%
Increase (decrease) through changes in models or risk parameters, financial assets	$ 24	$ 29
Percentage of entity's revenue	3.00%
Expected Revenue From Airplan	$ 23,474,154

X

- Definition

Represents expected revenue.

+ References

No definition available.

+ Details

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Period Type:	duration

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- References

No definition available.

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- Definition

The rate of expected credit losses, calculated as percentage of the gross carrying amount. Expected credit losses are the weighted average of credit losses with the respective risks of a default occurring as the weights.

+ References

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- Definition

The increase (decrease) in financial assets resulting from changes in models or risk parameters. [Refer: Financial assets]

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- Definition

The percentage of the entity's revenue. [Refer: Revenue]

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