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Accounts payable and accrued expenses: | 12 Months Ended
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Dec. 31, 2017
Trade and other payables [abstract] |
Disclosure of trade and other payables [text block] | Note 10 - Accounts payable and accrued expenses: At December 31, 2016 and 2017, the balances are as follows:
|  | December 31, |
|  | 2016 |  | 2017 |
Suppliers |  | Ps | 11,401 |  | Ps | 428,881 |
Taxes payable |  |  | 116,643 |  |  | 157,387 |
Use rights of assets under concession |  |  | 109,437 |  |  | 127,076 |
Accounts payable to related parties (Note 15.1) |  |  | 71,725 |  |  | 87,951 |
Salaries payable |  |  | 71,022 |  |  | 111,984 |
Sundry creditors for services provided |  |  | 94,349 |  |  | 583,059 |
Interest payable of the Bank Loans (Note 12) |  |  |  |  |  | 340,288 |
Accounts payable to contractors |  |  | 657 |  |  | 265,236 |
Total |  | Ps | 475,234 |  | Ps | 2,101,862 |
Due to the fact that these accounts mature at a term of under one year, their fair value is considered to approximate their book value.

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- Definition The disclosure of trade and other payables. [Refer: Trade and other payables] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_10_e&doctype=Standard -URIDate 2017-03-09 + Details
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