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Stock-Based Awards (Tables)
 9 Months Ended
Apr. 29, 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 nine months ended April 29, 2017 and April 23, 2016 were as follows (dollars in thousands):
 
For the Three Months Ended
 
For the Nine Months Ended
 
April 29, 2017
 
April 23, 2016
 
April 29, 2017
 
April 23, 2016
Stock-based compensation
$
4,915

 
$
3,892

 
$
15,930

 
$
12,600

Related tax benefit for stock-based compensation
$
1,943

 
$
1,467

 
$
6,126

 
$
4,809
Schedule of Share-based Compensation, Stock Options Award Activity
The following table summarizes stock option award activity during the nine months ended April 29, 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
(101,411
)
 
$
14.14

Canceled
(1,000
)
 
$
6.83

Outstanding as of April 29, 2017
671,770

 
$
25.21

 
 
 
 
Exercisable options as of April 29, 2017
540,798

 
$
18.32
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 April 29, 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
64,546

 
$
78.70

 
274,282

 
$
79.29

Share units vested
(114,297
)
 
$
35.42

 
(287,593
)
 
$
40.53

Forfeited or canceled
(3,935
)
 
$
46.63

 
(56,854
)
 
$
42.67

Outstanding as of April 29, 2017
197,578

 
$
58.42

 
555,806

 
$
67.46