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Short and long-term documents: (Details) $ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 MXN ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 MXN ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 MXN ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Long-term debt:
Principal amortization	$ (220,961)		$ (253,925)		$ (205,308)
Long	6,598,397		6,641,941
Fair value	6,324,474		6,400,498
Senior secured notes due on March 22, 2035
Long-term debt:
Credit line	7,207,061		7,265,206			$ 400,000	$ 400,000
Interest	(34,031)	$ (11,102)	(39,105)	$ (10,577)
Principal amortization	(220,961)		(253,925)
Short	353,672		330,235
Long	6,598,397		6,641,941
Fair value	$ 7,619,720		$ 7,697,476

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- Definition

The current portion of non-current borrowings. [Refer: Borrowings]

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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The fair value of financial liabilities. [Refer: At fair value [member]; Financial liabilities]

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