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Net Earnings Per Share Net Earnings Per Share (Notes)
3 Months Ended
Mar. 31, 2021
Earnings Per Share [Abstract]  
Earnings Per Share [Text Block] Net Earnings Per Share
The following table sets forth the reconciliation of the numerator and denominator utilized in the computation of basic and diluted earnings per share (in thousands): 
Three Months Ended
 March 31,
 20212020
Numerator for earnings per share:
Net earnings for basic and diluted earnings per share$38,807 $15,424 
Denominator for earnings per share:
Weighted average number of common shares outstanding131,183 133,596 
Assumed exercise of stock options and vesting of restricted stock awards, net of shares assumed reacquired under the treasury stock method1,413 1,331 
Diluted shares outstanding132,596 134,927 
The effect of stock-based compensation awards for the three months ended March 31, 2021 and 2020 that aggregated approximately 119,000 and 6,000 shares, respectively, have been excluded for purposes of diluted earnings per share since the effect of their inclusion would have been anti-dilutive.