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Earnings Per Share (Tables)
9 Months Ended
Sep. 30, 2020
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 September 30,Nine Months Ended September 30,
2020201920202019
(In thousands)
Weighted average shares:
Basic shares229,576 228,041 229,254 227,493 
Equity-based compensation plans1,884 1,519 1,650 1,698 
Diluted shares231,460 229,560 230,904 229,191