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Consolidated Statements of Changes in Equity $ in Thousands, $ in Thousands | Capital stock USD ($) | Capital stock MXN ($) | Treasury Shares USD ($) | Treasury Shares MXN ($) | Contributions for future capital increases MXN ($) | Legal reserve USD ($) | Legal reserve MXN ($) | Additional paid-in capital USD ($) | Additional paid-in capital MXN ($) | Accumulated Deficit USD ($) | Accumulated Deficit MXN ($) | Other comprehensive (loss) income USD ($) | Other comprehensive (loss) income MXN ($) | USD ($) | MXN ($)
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance as of beginning of the year at Dec. 31, 2018 |  | $ 2,973,559 |  | $ (122,661) | $ 1 |  | $ 291,178 |  | $ 1,837,073 |  | $ (2,200,651) |  | $ (73,346) |  | $ 2,705,153
Treasury shares |  |  |  | (75,375) |  |  |  |  | 56,483 |  |  |  |  |  | (18,892)
Exercise of stock options (Note 18) |  |  |  | 14,773 |  |  |  |  |  |  |  |  |  |  | 14,773
Long-term incentive plan cost (Note 18) |  |  |  | 13,549 |  |  |  |  | (13,549) |  |  |  |  |  |
Net income (loss) for the period |  |  |  |  |  |  |  |  |  |  | 2,639,063 |  |  |  | 2,639,063
Other comprehensive income (loss) items |  |  |  |  |  |  |  |  |  |  |  |  | 189,586 |  | 189,586
Total comprehensive income (loss) for the year |  |  |  |  |  |  |  |  |  |  | 2,639,063 |  | 189,586 |  | 2,828,649
Balance as of end of the year at Dec. 31, 2019 |  | 2,973,559 |  | (169,714) | 1 |  | 291,178 |  | 1,880,007 |  | 438,412 |  | 116,240 |  | 5,529,683
Capital stock increase (Note 19) |  | 452,847 |  |  |  |  |  |  | 2,819,985 |  |  |  |  |  | 3,272,832
Treasury shares |  |  |  | (94,564) |  |  |  |  | 60,763 |  |  |  |  |  | (33,801)
Long-term incentive plan cost (Note 18) |  |  |  | 40,534 |  |  |  |  | (40,534) |  |  |  |  |  |
Net income (loss) for the period |  |  |  |  |  |  |  |  |  |  | (4,293,791) |  |  |  | (4,293,791)
Other comprehensive income (loss) items |  |  |  |  |  |  |  |  |  |  |  |  | (1,678,738) |  | (1,678,738)
Total comprehensive income (loss) for the year |  |  |  |  |  |  |  |  |  |  | (4,293,791) |  | (1,678,738) |  | (5,972,529)
Balance as of end of the year at Dec. 31, 2020 |  | 3,426,406 |  | (223,744) | 1 |  | 291,178 |  | 4,720,221 |  | (3,855,379) |  | (1,562,498) |  | 2,796,185
Treasury shares |  |  |  | (89,209) |  |  |  |  | (19,215) |  |  |  |  |  | (108,424)
Exercise of stock options (Note 18) |  |  |  | 56,904 |  |  |  |  |  |  |  |  |  |  | 56,904
Long-term incentive plan cost (Note 18) |  |  |  | 46,666 |  |  |  |  | (46,666) |  |  |  |  |  |
Net income (loss) for the period |  |  |  |  |  |  |  |  |  |  | 2,120,551 |  |  | $ 103,022 | 2,120,551
Other comprehensive income (loss) items |  |  |  |  |  |  |  |  |  |  |  |  | 1,580,222 | 76,771 | 1,580,222
Total comprehensive income (loss) for the year |  |  |  |  |  |  |  |  |  |  | 2,120,551 |  | 1,580,222 | 179,793 | 3,700,773
Balance as of end of the year at Dec. 31, 2021 | $ 166,464 | $ 3,426,406 | $ (10,172) | $ (209,383) | $ 1 | $ 14,146 | $ 291,178 | $ 226,120 | $ 4,654,340 | $ (84,282) | $ (1,734,828) | $ 861 | $ 17,724 | $ 313,137 | $ 6,445,438

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