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Stock-Based Awards (Tables)
 9 Months Ended
Oct. 27, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Stock-based Compensation Expense and Related Tax Benefit Recognized
Stock-based compensation expense and the related tax benefit recognized and realized during the three and nine months ended October 27, 2018 and October 28, 2017 were as follows (dollars in thousands):
 
For the Three Months Ended
 
For the Nine Months Ended
 
October 27, 2018
 
October 28, 2017
 
October 27, 2018
 
October 28, 2017
Stock-based compensation
$
7,366

 
$
7,380

 
$
18,277

 
$
17,169

Income tax effect of stock-based compensation
$
2,083

 
$
2,882

 
$
4,572

 
$
6,695
Schedule of Share-based Compensation, Stock Options Award Activity
The following table summarizes stock option award activity during the nine months ended October 27, 2018:
 
Stock Options
 
Shares
 
Weighted Average Exercise Price
Outstanding as of January 27, 2018
636,730

 
$
27.93

Granted
28,796

 
$
106.19

Options exercised
(45,217
)
 
$
11.07

Canceled
—

 
$
—

Outstanding as of October 27, 2018
620,309

 
$
32.80

 
 
 
 
Exercisable options as of October 27, 2018
509,023

 
$
23.16
Schedule of Share-based Compensation, RSU and Performance RSU Activity
The following table summarizes RSU and Performance RSU award activity during the nine months ended October 27, 2018:
 
Restricted Stock
 
RSUs
 
Performance RSUs
 
Share Units
 
Weighted Average Grant Price
 
Share Units
 
Weighted Average Grant Price
Outstanding as of January 27, 2018
133,896

 
$
71.81

 
390,327

 
$
80.52

Granted
54,757

 
$
102.14

 
218,628

 
$
106.19

Share units vested
(18,713
)
 
$
74.95

 
(54,704
)
 
$
83.07

Forfeited or canceled
(6,673
)
 
$
70.56

 
(55,255
)
 
$
74.45

Outstanding as of October 27, 2018
163,267

 
$
81.67

 
498,996

 
$
92.16