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Capital Stock and Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2021
Earnings Per Share [Abstract]  
Schedule of Common Shares Share information regarding the Company's common stock at December 31, was as follows:
20212020
Common stock shares:
Authorized800,000,000 800,000,000 
Issued169,364,686 168,503,526 
Outstanding153,569,061 152,930,740 
Treasury stock shares15,795,625 15,572,786 
Reconciliation of Earnings Per Share Basic and Diluted The computation of basic and diluted earnings per share for the years ended December 31, was as follows (in thousands except per share amounts):
202120202019
Net income$650,024 $1,298 $423,635 
Basic weighted-average shares outstanding153,747 153,186 157,054 
Effect of dilutive securities – employee stock compensation plan1,233 722 750 
Diluted weighted-average shares outstanding154,980 153,908 157,804 
Earnings per share:
Basic$4.23 $0.01 $2.70 
Diluted$4.19 $0.01 $2.68