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Stock-Based Awards (Tables)
 6 Months Ended
Jan. 28, 2017
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 during the three and six months ended January 28, 2017 and January 23, 2016 were as follows (dollars in thousands):
 
For the Three Months Ended
 
For the Six Months Ended
 
January 28, 2017
 
January 23, 2016
 
January 28, 2017
 
January 23, 2016
Stock-based compensation
$
5,309

 
$
4,200

 
$
11,015

 
$
8,708

Related tax benefit for stock-based compensation
$
2,000

 
$
1,613

 
$
4,183

 
$
3,342
Schedule of Share-based Compensation, Stock Options Award Activity
The following table summarizes stock option award activity during the six months ended January 28, 2017:
 
Stock Options
 
Shares
 
Weighted Average Exercise Price
Outstanding as of July 30, 2016
737,267

 
$
20.99

Granted
36,914

 
$
78.46

Options exercised
(48,543
)
 
$
10.06

Canceled
(1,000
)
 
$
6.83

Outstanding as of January 28, 2017
724,638

 
$
24.67

 
 
 
 
Exercisable options as of January 28, 2017
593,666

 
$
18.28
Schedule of Share-based Compensation, RSU and Performance RSU Activity
The following table summarizes RSU and Performance RSU award activity during the six months ended January 28, 2017:
 
Restricted Stock
 
RSUs
 
Performance RSUs
 
Share Units
 
Weighted Average Grant Price
 
Share Units
 
Weighted Average Grant Price
Outstanding as of July 30, 2016
251,264

 
$
42.56

 
625,971

 
$
47.66

Granted
60,485

 
$
77.76

 
274,282

 
$
79.29

Share units vested
(107,447
)
 
$
35.20

 
(287,593
)
 
$
40.53

Forfeited or canceled
(1,223
)
 
$
29.84

 
(53,129
)
 
$
41.18

Outstanding as of January 28, 2017
203,079

 
$
57.01

 
559,531

 
$
67.44