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Balances and transactions with related parties: Compensation of key personnel (Details) - Key Management - MXN ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Related parties:      
Short-term salaries and other benefits paid to key personnel (Note 18.17) $ 137,272 $ 109,747 $ 119,202
Directors' remuneration expense $ 8,571 $ 9,146 $ 8,695