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SHAREHOLDERS' EQUITY (Common Shares Issued and Outstanding) (Details) - shares
shares in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Shares issued, balance at beginning of period (in shares)     176,580    
Total shares issued at end of period (in shares) 176,580   176,580    
Treasury shares, balance at beginning of period (in shares)     (92,227)    
Total treasury shares at end of period (in shares) (91,807)   (91,807)    
Total shares outstanding (in shares) 84,773   84,773   84,353
Common stocks          
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Shares issued, balance at beginning of period (in shares) 176,580 176,580 176,580 176,580  
Shares issued (in shares) 0 0 0 0  
Total shares issued at end of period (in shares) 176,580 176,580 176,580 176,580  
Treasury shares, balance at beginning of period (in shares) (91,813) (92,274) (92,227) (92,621)  
Shares repurchased (in shares) (4) (2) (201) (155)  
Shares reissued (in shares) 10 5 621 505  
Total treasury shares at end of period (in shares) (91,807) (92,271) (91,807) (92,271)  
Total shares outstanding (in shares) 84,773 84,309 84,773 84,309