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Retirement Employee Benefits - Additional Information (Detail) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure Of Defined Benefit Plans [Line Items]
Employer contribution percentage	2.00%
Defined contribution plan expense	$ 7,162	$ 6,001	$ 4,986
Interest rate curve of government bonds tenure	30 years
Average life expectancy	65 years
Male average life expectancy	17 years
Female average life expectancy	19 years
Discount Rate Assumption [Member]
Disclosure Of Defined Benefit Plans [Line Items]
Increase decrease in basis points	1.00%
Liability for retirement impacted	$ 14,321

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

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- Definition

The increase (decrease) in a defined benefit obligation that would have been caused by an increase in a significant actuarial assumption that was reasonably possible at the end of the reporting period. [Refer: Actuarial assumptions [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
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-IssueDate 2018-01-01
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- Definition

The reasonably possible percentage of the increase in the actuarial assumption used to determine the present value of defined benefit obligation. [Refer: Actuarial assumptions [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The amount of post-employment benefit expense relating to defined contribution plans. Defined contribution plans are post-employment benefit plans under which an entity pays fixed contributions into a separate entity (a fund) and will have no legal or constructive obligation to pay further contributions if the fund does not hold sufficient assets to pay all employee benefits relating to employee service in the current and prior periods.

+ References

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-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_53&doctype=Standard
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- Definition

Average life expectancy assumptions.

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Female average life expectancy assumptions.

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Interest rate curve of government bonds tenure.

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Male average life expectancy assumptions.

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