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Earnings per Share
 9 Months Ended
Sep. 28, 2018
Earnings Per Share [Abstract]  
Earnings per Share

The following table sets forth the computation of basic and diluted earnings per share (in thousands, except per share amounts):
 
Three Months Ended
 
Nine Months Ended
 
September 28,
2018
 
September 29,
2017
 
September 28,
2018
 
September 29,
2017
Net earnings available to common shareholders
$
92,681

 
$
75,460

 
$
267,331

 
$
216,020

Weighted average shares outstanding for basic earnings per share
167,247

 
168,069

 
167,860

 
167,592

Dilutive effect of stock options computed using the treasury stock method and the average market price
5,790

 
6,544

 
6,124

 
6,252

Weighted average shares outstanding for diluted earnings per share
173,037

 
174,613

 
173,984

 
173,844

Basic earnings per share
$
0.55

 
$
0.45

 
$
1.59

 
$
1.29

Diluted earnings per share
$
0.54

 
$
0.43

 
$
1.54

 
$
1.24



Stock options to purchase 435,000 and 18,000 shares were not included in the September 28, 2018 and September 29, 2017 computations of diluted earnings per share, respectively, because they would have been anti-dilutive.