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Net Earnings Per Share Net Earnings Per Share
3 Months Ended
Mar. 31, 2018
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,
 
2018
 
2017
Numerator for earnings per share:
 
 
 
Net earnings for basic and diluted earnings per share
$
39,195

 
$
42,571

Denominator for earnings per share:
 
 
 
Weighted average number of common shares outstanding
138,504

 
136,359

Assumed exercise of stock options and vesting of restricted stock awards, net of shares assumed reacquired under the treasury stock method
2,490

 
1,880

Diluted shares outstanding
140,994

 
138,239



The effect of stock-based compensation awards for the three months ended March 31, 2017 that aggregated 18,000 shares have been excluded for purposes of diluted earnings per share since the effect of their inclusion would have been anti-dilutive. There were no shares excluded for the three months ended March 31, 2018.