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Stockholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2021
Disclosure of investments accounted for using equity method [text block] [Abstract]  
Schedule of common stock
  

Number of
shares

(in thousands)

   Amount 
Fixed capital   90,850   $441,786 
Variable capital   406,859    1,978,444 
    497,709    2,420,230 
Effect of restatement        412,038 
Total   497,709   $2,832,268 

 
Schedule of reconciliation of the number of shares outstanding
   Thousands of shares  
   2021  2020  
Shares outstanding at beginning of year   463,243    466,141 
Repurchase of capital shares, net   (662)   (2,898)
Shares outstanding at yearend   462,581    463,243