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Computation of Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2023
Earnings Per Share [Abstract]  
Schedule Of Basic And Diluted Earnings Per Share Calculations The table below sets forth the calculation of basic and diluted income per share for the periods indicated (in thousands, except per share data).
Three Months Ended
 March 31,
 20232022
Numerator:  
Net income used for calculating basic and diluted income per share$295,783 $172,515 
Denominator:  
Weighted average common shares used in the calculation of basic income per share 79,452 82,020 
Dilutive effect of outstanding awards associated with stock-based compensation plans (1)830 953 
Shares used in the calculation of diluted income per share 80,282 82,973 
Basic income per share$3.72 $2.10 
Diluted income per share $3.68 $2.08 
(1)Certain outstanding awards associated with stock-based compensation plans were not included in the computation of diluted income per share because the effect would have been anti-dilutive. These anti-dilutive outstanding awards associated with stock-based compensation plans totaled approximately 0.3 million and 0.2 million for the three months ended March 31, 2023 and 2022, respectively.