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Stockholder's Equity (Tables)
12 Months Ended
Jul. 31, 2015
Equity [Abstract]  
Schedule of stock options exercised
The exercised stock options are summarized in the following table:
Period
Options
Exercised
 
Exercise
Price
 
Shares Net
Settled for
Exercise
 
Shares
Withheld
for Taxes(1)
 
Net
Shares to
Employee
 
Share
Price for
Withholding
 
Tax
Withholding
(in 000s)
FY 2013—Q2
73,228

 
$
8.89

 
18,127

 
17,461

 
37,640

 
$
35.91

 
$
627

FY 2014—Q1
14,000

 
16.43

 
7,241

 
2,519

 
4,240

 
31.77

 
80

FY 2015—Q1
201,333

 
19.59

 
124,621

 
35,416

 
41,296

 
31.65

 
1,121

FY 2015—Q3
139,690

 
20.27

 
76,021

 
20,656

 
43,013

 
37.27

 
770

FY 2015—Q4
200,000

 
12.02

 
66,602

 
52,158

 
81,240

 
36.08

 
1,882

 
(1)
Shares withheld for taxes are treated as a repurchase of shares for accounting purposes but do not count against the Company’s stock repurchase program.
Schedule of share-based compensation expense
The following table details stock-based payment compensation expense included in the company’s consolidated statements of income:
 
Year Ended July 31,
(In thousands)
2015
 
2014
 
2013
General and administrative
$
15,938

 
$
19,489

 
$
17,238

Yard operations
2,216

 
2,610

 
2,319

Total stock-based payment compensation
$
18,154

 
$
22,099

 
$
19,557

Schedule of non-vested shares
A summary of the status of the Company’s non-vested shares and its activity during the year ended July 31, 2015 was as follows:
(In thousands, except per share amounts)
Number of
Shares
 
Weighted
Average Grant-
date Fair Value
Non-vested shares at July 31, 2014
5,921

 
$
10.39

Grants of non-vested shares
2,891

 
10.18

Vested
(1,984
)
 
9.83

Forfeitures or expirations
(213
)
 
10.37

Non-vested shares at July 31, 2015
6,615

 
$
10.48

Schedule of option activity
Stock option activity for the year ended July 31, 2015 was as follows:
(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, 2014
19,082

 
$
21.64

 
6.01
 
$
235,734

Grants of options
2,891

 
35.95

 
 
 
 
Exercises
(749
)
 
17.11

 
 
 
 
Forfeitures or expirations
(213
)
 
33.40

 
 
 
 
Outstanding as of July 31, 2015
21,011

 
$
23.65

 
5.78
 
$
261,339

Exercisable as of July 31, 2015
14,396

 
$
18.38

 
4.37
 
$
254,158

Vested and expected to vest as of July 31, 2015
20,542

 
$
23.39

 
5.72
 
$
260,845

Schedule of stock options outstanding and exercisable
The following table summarizes stock options outstanding and exercisable as of July 31, 2015:
(In thousands, except per share amount)
Options Outstanding
 
Options Exercisable
Range of Exercise Prices
Number
 
Weighted
Average
Remaining
Contractual
Life
 
Weighted
Average
Exercise
Price
 
Number
 
Weighted
Average
Exercise
Price
$12.02–$17.20
10,484

 
3.61
 
$
15.42

 
10,464

 
$
15.42

$17.32–$21.05
2,122

 
4.90
 
19.83

 
1,942

 
19.76

$22.47–$35.45
2,503

 
8.95
 
32.29

 
594

 
25.21

$35.62–$37.22
5,902

 
8.61
 
35.99

 
1,396

 
35.71

 
21,011

 
5.78
 
23.65

 
14,396

 
18.38