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Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2021
Earnings Per Share [Abstract]  
Weighted-Average Shares Outstanding for Computation of Basic and Diluted Income per Common Share The following table reconciles the weighted-average shares outstanding used for these computations.
(Weighted-average shares)
202120202019
Basic method154,290,741 153,507,109 163,992,427 
Dilutive stock options 1 
— — 820,001 
Diluted method154,290,741 153,507,109 164,812,428 
1 Due to a net loss recognized by the Company for the year ended December 31, 2021 and 2020, no unvested stock awards were included in the computation of diluted earnings per share because the effect would have been antidilutive.
Anti Dilutive Securities Not Included in Computation of Diluted EPS
The following table reflects certain options to purchase shares of common stock that were outstanding during the three years ended December 31, 2021 but were not included in the computation of dilutive earnings per share because the incremental shares from the assumed conversion were antidilutive.
202120202019
Antidilutive stock options excluded from diluted shares1,420,992 2,246,532 2,947,401 
Weighted average price of these options$35.30 $39.67 $45.26