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Earnings Per Share (Tables)
 6 Months Ended
Jul. 31, 2016
Earnings Per Share [Abstract]  
Computation of Basic and Diluted Earnings Per Common Share
The computation of basic and diluted earnings (loss) per common share is as follows:
 
Three Months Ended
 
Six Months Ended
(in thousands, except per share amounts)
July 31, 2016
 
July 26, 2015
 
July 31, 2016
 
July 26, 2015
Net income (loss)
$
8,978

 
$
(313
)
 
$
15,866

 
$
(455
)
 
 
 
 
 
 
 
 
Weighted average common shares outstanding - basic
65,299

 
65,920

 
65,222

 
66,319

Dilutive effect of options and restricted stock units
606

 
—

 
501

 
—

Weighted average common shares outstanding - diluted
65,905

 
65,920

 
65,723

 
66,319

 
 
 
 
 
 
 
 
Basic earnings (loss) per common share
$
0.14

 
$
(0.00
)
 
$
0.24

 
$
(0.01
)
Diluted earnings (loss) per common share
$
0.14

 
$
(0.00
)
 
$
0.24

 
$
(0.01
)
 
 
 
 
 
 
 
 
Anti-dilutive shares not included in the above calculations
1,466

 
2,894

 
1,774

 
2,418