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Earnings Per Share
 6 Months Ended
Jun. 30, 2022
Earnings Per Share [Abstract]  
Earnings Per Share Earnings Per Share
The calculation of basic earnings per share is based on the weighted average number of common shares considered outstanding during the periods. The calculation of diluted earnings per share reflects the effect of all potentially dilutive securities (principally outstanding stock options and restricted stock grants). Securities that are anti-dilutive have been excluded and are not significant. The number of weighted average shares used in the calculation of basic earnings per share and diluted earnings per share was as follows:
Three Months Ended June 30,Six Months Ended June 30,
2022202120222021
(In thousands)
Weighted average shares:
Basic shares230,100 230,828 230,790 230,632 
Equity-based compensation plans1,147 2,013 1,366 1,937 
Diluted shares231,247 232,841 232,156 232,569