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Transactions with Related Parties - Compensation (Details) - MXN ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Transactions with related parties |  |  |
Defined benefit obligation | $ 2,419,153 | $ 2,514,235 |
Service cost | 132,055 | 125,952 |
Directors, alternate directors and officers |  |  |
Transactions with related parties |  |  |
Key management compensation | 892,769 | 832,905 | $ 750,208
Defined benefit obligation | 164,018 | 177,864 | 173,020
Cumulative contributions made by the Group to the pension and seniority premium plans on behalf of these directors and officers | 115,467 | 140,958 | $ 144,517
Officers | Cable |  |  |
Transactions with related parties |  |  |
Defined benefit obligation | 807,031 | 504,230 |
Deferred compensation plan term |  |  | 5 years
Service cost | $ 302,801 | $ 340,202 | $ 164,028

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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from employee service in the current period. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_a&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The present value, without deducting any plan assets, of expected future payments required to settle the obligation resulting from employee service in the current and prior periods. [Refer: Plan assets, at fair value] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 57 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_57_a&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of compensation to key management personnel. [Refer: Key management personnel of entity or parent [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 24 -IssueDate 2017-01-01 -Paragraph 17 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=24&date=2017-03-01&anchor=para_17&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition Term of deferred compensation plan, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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