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Consolidated Statements of Comprehensive Income
$ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2020
USD ($)
Dec. 31, 2020
MXN ($)
Dec. 31, 2019
MXN ($)
Dec. 31, 2018
MXN ($)
Consolidated Statements of Comprehensive Income        
Net (loss) income for the year $ (215,242) $ (4,293,791) $ 2,639,063 $ (942,882)
Other comprehensive (loss) income to be reclassified to profit or loss in subsequent periods:        
Net (loss) gain on cash flow hedges (Note 22) (87,609) (1,747,686) 263,495 (283,691)
Income tax effect (Note 19) 2,348 46,835 (74,820) 85,107
Exchange differences on translation of foreign operations 1,202 23,970 8,045 22,156
Other comprehensive (loss) income not to be reclassified to profit or loss in subsequent periods:        
Remeasurement (loss) gain of employee benefits (Note 16) (133) (2,651) (10,192) 5,989
Income tax effect (Note 19) 40 794 3,058 (1,797)
Other comprehensive (loss) income for the year, net of tax (84,152) (1,678,738) 189,586 (172,236)
Total comprehensive (loss) income for the year, net of tax $ (299,394) $ (5,972,529) $ 2,828,649 $ (1,115,118)