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Description of the business and summary of significant accounting policies - Revenue recognition and financial instruments (Details) $ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2017 USD ($) | Dec. 31, 2017 MXN ($) | Dec. 31, 2016 MXN ($) | Dec. 31, 2015 MXN ($)
Non-ticket revenues |  |  |  |
Air travel-related services |  | $ 6,293,747 | $ 5,055,836 | $ 3,418,654
Non-air travel-related services |  | 589,338 | 494,864 | 441,393
Cargo |  | 170,973 | 171,621 | 189,292
Total non-ticket revenues | $ 357,431 | 7,054,058 | 5,722,321 | 4,049,339
Impairment on accounts receivable |  | $ 4,720 | $ 9,164 | $ 8,825

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- Definition The amount of revenue arising from the rendering of cargo and mail transport services. [Refer: Revenue] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Note Expiry date 2018-01-01 -Name IAS -Number 18 -IssueDate 2017-01-01 -Paragraph 35 -Subparagraph b -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=18&date=2017-03-02&anchor=para_35_b_ii&doctype=Standard&book=B -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard -URIDate 2017-03-09 + Details
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