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Earnings Per Share
 9 Months Ended
Sep. 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 September 30,Nine Months Ended September 30,
2023202220232022
(In thousands)
Weighted average shares:
Basic shares230,691 229,500 230,431 230,360 
Equity-based compensation plans1,060 1,214 983 1,315 
Diluted shares231,751 230,714 231,414 231,675