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Weighted-Average Shares (Tables)
9 Months Ended
Oct. 01, 2017
Earnings Per Share [Abstract]  
Calculation of Weighted-Average Shares
Weighted-average shares were calculated as follows (in thousands):
 
Three-months Ended
 
Nine-months Ended
 
October 1, 2017
 
October 2, 2016
 
October 1, 2017
 
October 2, 2016
Basic weighted-average common shares outstanding
86,617

 
85,460

 
86,526

 
85,167

Effect of dilutive stock options
3,060

 
1,886

 
3,036

 
1,638

Weighted-average common and common-equivalent shares outstanding
89,677

 
87,346

 
89,562

 
86,805