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Financial risk management: (Details 2) - MXN ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Financial risk management [Abstract]
Current assets	$ 5,787,862	$ 4,233,018
Current liabilities	2,408,649	593,183
Short term position (liquidity)	$ 3,379,213	$ 3,639,835

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No definition available.

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The amount of assets that the entity (a) expects to realise or intends to sell or consume in its normal operating cycle; (b) holds primarily for the purpose of trading; (c) expects to realise within twelve months after the reporting period; or (d) classifies as cash or cash equivalents (as defined in IAS 7) unless the asset is restricted from being exchanged or used to settle a liability for at least twelve months after the reporting period. [Refer: Assets]

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The amount of current assets less the amount of current liabilities.

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The amount of liabilities that: (a) the entity expects to settle in its normal operating cycle; (b) the entity holds primarily for the purpose of trading; (c) are due to be settled within twelve months after the reporting period; or (d) the entity does not have an unconditional right to defer settlement for at least twelve months after the reporting period.

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