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Earnings Per Share (Tables)
 3 Months Ended
Apr. 30, 2017
Earnings Per Share [Abstract]  
Computation of Basic and Diluted Earnings Per Common Share
The computation of basic and diluted earnings per common share was as follows:
 
Three Months Ended
(in thousands, except per share amounts)
April 30, 2017
 
May 1, 2016
Net income
$
11,821

 
$
6,887

 
 
 
 
Weighted average common shares outstanding - basic
65,839

 
65,144

Dilutive effect of stock options and restricted stock units
1,537

 
408

Weighted average common shares outstanding - diluted
67,376

 
65,552

 
 
 
 
Basic earnings per common share
$
0.18

 
$
0.11

Diluted earnings per common share
$
0.18

 
$
0.11

 
 
 
 
Anti-dilutive shares not included in the above calculations
686

 
2,123