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DISCLOSURE OF CHANGES IN NUMBER OF SHARES - shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Treasury stock (8,802,593) (4,377,458)  
Common Stock - Outstanding 95,589,629 99,942,845  
Common Stock      
Beginning balance 104,320,303 104,238,159 104,058,684
Issuance of stock 71,919 82,144 179,475
Balance at end of year 104,392,222 104,320,303 104,238,159
Treasury stock (8,802,593) (4,377,458) (2,169,178)
Common Stock - Outstanding 95,589,629 99,942,845 102,068,981
Preferred Stock      
Beginning balance 2,006,391 2,006,391 2,006,391
Balance at end of year 2,006,391 2,006,391 2,006,391