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Stock-Based Awards (Tables)
 3 Months Ended
Oct. 29, 2016
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 related to stock options and restricted share units during the three months ended October 29, 2016 and October 24, 2015 were as follows (dollars in thousands):
 
For the Three Months Ended
 
October 29, 2016
 
October 24, 2015
Stock-based compensation
$
5,707

 
$
4,509

Tax benefit recognized in the statement of operations
$
2,183

 
$
1,729
Schedule of Share-based Compensation, Stock Options Award Activity
The following table summarizes stock option award activity during the three months ended October 29, 2016:

 
Stock Options
 
Shares
 
Weighted Average Exercise Price
Outstanding as of July 30, 2016
737,267

 
$
20.99

Granted
—

 
$
—

Options exercised
(22,284
)
 
$
9.08

Canceled
(1,000
)
 
$
6.83

Outstanding as of October 29, 2016
713,983

 
$
21.39

 
 
 
 
Exercisable options as of October 29, 2016
530,211

 
$
15.92
Schedule of Share-based Compensation, RSU and Performance RSU Activity
The following table summarizes RSU and Performance RSU award activity during the three months ended October 29, 2016:
 
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
571

 
$
93.78

 
31,564

 
$
85.64

Share units vested
(8,396
)
 
$
65.25

 
(30,518
)
 
$
42.15

Forfeited or canceled
(785
)
 
$
25.79

 
(51,145
)
 
$
40.44

Outstanding as of October 29, 2016
242,654

 
$
41.95

 
575,872

 
$
50.67