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Earnings Per Share (Tables)
3 Months Ended
Mar. 31, 2021
Earnings Per Share [Abstract]  
Number of Weighted Average Shares 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 March 31,
20212020
(In thousands)
Weighted average shares:
Basic shares230,435 228,962 
Equity-based compensation plans1,861 1,910 
Diluted shares232,296 230,872