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Earnings Per Share
 6 Months Ended
Jun. 30, 2023
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). 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,
2023202220232022
(In thousands)
Weighted average shares:
Basic shares230,478 230,100 230,302 230,790 
Equity-based compensation plans783 1,147 943 1,366 
Diluted shares231,261 231,247 231,245 232,156