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Stock-based Payment Compensation (Tables)
 6 Months Ended
Jan. 31, 2020
Share-based Payment Arrangement [Abstract]  
Summary of option activity for stock options The following is a summary of activity for the Company’s stock options for the six months ended January 31, 2020:
(In thousands, except per share and term data)
 
Shares
 
Weighted Average Exercise Price
 
Weighted Average Remaining Contractual Term (In years)
 
Aggregate Intrinsic Value
Outstanding as of July 31, 2019
 
14,552

 
$
26.29

 
6.04
 
$
745,592

Grants of options
 
150

 
88.58

 
 
 
 
Exercises
 
(5,852
)
 
17.74

 
 
 
 
Forfeitures or expirations
 
(3
)
 
17.69

 
 
 
 
Outstanding as of January 31, 2020
 
8,847

 
$
33.01

 
6.56
 
$
605,592

Exercisable as of January 31, 2020
 
5,315

 
$
23.53

 
5.53
 
$
414,187
Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] The following is a summary of activity for the Company’s restricted stock for the six months ended January 31, 2020:
(In thousands, except per share data)
 
Restricted Shares
 
Weighted Average Grant Date Fair Value
Outstanding as of July 31, 2019
 
134

 
$
56.62

Grants of restricted stock
 
69

 
82.33

Vested restricted stock
 
(3
)
 
47.18

Forfeited restricted stock
 
(2
)
 
63.07

Outstanding as of January 31, 2020
 
198

 
$
65.58
Recognized stock-based compensation expense
The table below sets forth the stock-based compensation recognized by the Company for stock options and restricted stock awards:
 
 
Three Months Ended January 31,
 
Six Months Ended January 31,
(In thousands)
 
2020
 
2019
 
2020
 
2019
General and administrative
 
$
4,704

 
$
4,691

 
$
9,145

 
$
9,680

Yard operations
 
1,437

 
1,238

 
2,529

 
2,270

Total stock-based compensation
 
$
6,141

 
$
5,929

 
$
11,674

 
$
11,950