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Transactions with Related Parties - Other transactions (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 MXN ($) item director | Dec. 31, 2019 MXN ($) | Dec. 31, 2018 MXN ($)
Transactions with related parties |  |  |
Number of Mexican banks that have made loans to Group | item | 2 |  |
Aggregate annual amount of contracts leasing office space | $ 32,784 | $ 29,613 | $ 28,155
Consulting firm |  |  |
Transactions with related parties |  |  |
Fees for services received | 19,433 | 19,758 | 15,414
Professional services firm secretary of Company's Board |  |  |
Transactions with related parties |  |  |
Fees for services received | 52,848 | 34,603 | 26,547
Professional services firm, two directors |  |  |
Transactions with related parties |  |  |
Fees for services received | $ 121,789 | $ 20,554 | $ 19,431
Number of directors that maintain an interest in a professional services firm | director | 2 |  |

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- Definition The amount of leases where the entity was the lessee in related party transactions. [Refer: Related parties [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 24 -IssueDate 2020-01-01 -Paragraph 21 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=24&code=ifrs-tx-2020-en-r&anchor=para_21_d&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of services received in related party transactions. [Refer: Related parties [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 24 -IssueDate 2020-01-01 -Paragraph 21 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=24&code=ifrs-tx-2020-en-r&anchor=para_21_c&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The number of directors providing finance advisory services. + References No definition available. + Details
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- Definition Number of Mexican banks that have made loans to the entity. + References No definition available. + Details
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- Details
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