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Stockholders' equity (Schedule of Common Stock) (Details) - MXN ($) shares in Thousands, $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
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Disclosure of classes of share capital [abstract] |  |
Fixed capital, Shares | 90,850 | 90,850
Variable capital, Shares | 406,859 | 406,859
Share capital, Shares | 497,709 | 497,709
Total shares | 497,709 | 497,709
Fixed capital, Amount | $ 441,786 | $ 441,786
Variable capital, Amount | 1,978,444 | 1,978,444
Share capital, Amount | 2,420,230 | 2,420,230
Effect of restatement, Amount | 412,038 | 412,038
Total shares, Amount | $ 2,832,268 | $ 2,832,268

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- Definition The number of shares authorised. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 79 -Subparagraph a -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_79_a_i&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition Effect of restatement, Amount. + References No definition available. + Details
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- Definition Fixed capital, Amount. + References No definition available. + Details
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- Definition The number of fixed capital, shares. + References No definition available. + Details
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- Definition The number of share capital, shares. + References No definition available. + Details
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- Definition Share capital, Amount. + References No definition available. + Details
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- Definition Variable capital, Amount. + References No definition available. + Details
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- Definition The number of variable capital, shares. + References No definition available. + Details
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