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Consolidated Statements of Changes in Equity
$ in Thousands, $ in Thousands
Capital stock
USD ($)
Capital stock
MXN ($)
Treasury shares
USD ($)
Treasury shares
MXN ($)
Contribution for future capital increases
MXN ($)
Legal reserve
USD ($)
Legal reserve
MXN ($)
Additional paid-in capital
USD ($)
Additional paid-in capital
MXN ($)
Retained earnings (Accumulated losses)
USD ($)
Retained earnings (Accumulated losses)
MXN ($)
Remeasurement of employee benefits
USD ($)
Remeasurement of employee benefits
MXN ($)
Cash flow hedges
USD ($)
Cash flow hedges
MXN ($)
Exchange differences on translation of foreign operations
USD ($)
Exchange differences on translation of foreign operations
MXN ($)
USD ($)
MXN ($)
Balance as of beginning of the year at Dec. 31, 2014   $ 2,973,559   $ (114,789) $ 1   $ 38,250   $ 1,786,790   $ (55,783)   $ (1,482)   $ (156,766)       $ 4,469,780
Exercise of stock options       23,461                             23,461
Long-term incentive plan cost                 4,250                   4,250
Net (loss) income for the period                     2,463,870               2,463,870
Other comprehensive (loss) income items                         (822)   (135,708)       (136,530)
Total comprehensive (loss) income                     2,463,870   (822)   (135,708)       2,327,340
Balance as of end of the year at Dec. 31, 2015   2,973,559   (91,328) 1   38,250   1,791,040   2,408,087   (2,304)   (292,474)       6,824,831
Treasury shares       (17,025)         17,025                    
Exercise of stock options       17,536                             17,536
Forfeited shares from incentive plan       963         (963)                    
Long-term incentive plan cost       6,489         (6,489)                    
Net (loss) income for the period                     3,519,489               3,519,489
Other comprehensive (loss) income items                         (310)   437,286   $ (4,756)   432,220
Total comprehensive (loss) income                     3,519,489   (310)   437,286   (4,756)   3,951,709
Balance as of end of the year at Dec. 31, 2016   2,973,559   (83,365) 1   38,250   1,800,613   5,927,576   (2,614)   144,812   (4,756)   10,794,076
Legal reserve increase             252,928       (252,928)                
Treasury shares       (10,108)         10,108                    
Exercise of stock options       638                             638
Long-term incentive plan cost       7,801         (6,193)                   1,608
Net (loss) income for the period                     (594,599)             $ (30,129) (594,599)
Other comprehensive (loss) income items                         (1,243)   (30,131)   (7,178) (1,954) (38,552)
Total comprehensive (loss) income                     (594,599)   (1,243)   (30,131)   (7,178) (32,083) (633,151)
Balance as of end of the year at Dec. 31, 2017 $ 150,671 $ 2,973,559 $ (4,309) $ (85,034) $ 1 $ 14,754 $ 291,178 $ 91,436 $ 1,804,528 $ 257,408 $ 5,080,049 $ (195) $ (3,857) $ 5,811 $ 114,681 $ (605) $ (11,934) $ 514,971 $ 10,163,171