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INVESTMENT SECURITIES (Tables)
 6 Months Ended
Jan. 31, 2013
Investments, Debt and Equity Securities [Abstract]  
Summary of the Company's available-for-sale investments by category
The following is a summary of the Company’s available-for-sale investment securities by category which are classified within other non-current assets in the Company’s condensed consolidated balance sheets. Contractual maturity dates of debt securities held by the trust at January 31, 2013 range from 2013 to 2044.
 
Cost/
Amortized
Cost Basis
 
Fair Value
 
Gross
Unrealized
Holding
Gains
 
Gross
Unrealized
Holding
Losses
 
Net Unrealized
Holding
Gains/(Losses)
January 31, 2013
 
 
 
 
 
 
 
 
 
Equity securities
$
174

 
$
173

 
$
—

 
$
(1
)
 
$
(1
)
Debt securities:
 
 
 
 
 
 
 
 
 
Corporate
30,061

 
32,098

 
2,039

 
(2
)
 
2,037

U.S. Treasury
8,449

 
8,966

 
520

 
(3
)
 
517

Federal agency
23,500

 
25,141

 
1,681

 
(40
)
 
1,641

Mortgage-backed
5,796

 
6,136

 
361

 
(21
)
 
340

Municipal government
1,000

 
1,002

 
2

 
—

 
2

 
$
68,980

 
$
73,516

 
$
4,603

 
$
(67
)
 
$
4,536

 
 
 
 
 
 
 
 
 
 
July 31, 2012
 
 
 
 
 
 
 
 
 
Equity securities
$
212

 
$
206

 
$
—

 
$
(6
)
 
$
(6
)
Debt securities:
 
 
 
 
 
 
 
 
 
Corporate
30,548

 
32,378

 
1,838

 
(8
)
 
1,830

U.S. Treasury
8,049

 
8,610

 
562

 
(1
)
 
561

Federal agency
25,454

 
27,231

 
1,777

 
—

 
1,777

Mortgage-backed
6,129

 
6,392

 
290

 
(27
)
 
263

Municipal government
1,000

 
1,004

 
4

 
—

 
4

 
$
71,392

 
$
75,821

 
$
4,471

 
$
(42
)
 
$
4,429
Gross unrealized losses and fair value of Company's available-for-sale investments with unrealized losses aggregated by investment category and length of time
The following table shows the gross unrealized losses and fair value of the Company’s available-for-sale investments with unrealized losses aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position:
 
Less than 12 months
 
12 months or greater
 
Total
 
Fair
Value
 
Gross
Unrealized
Holding
Losses
 
Fair
Value
 
Gross
Unrealized
Holding
Losses
 
Fair
Value
 
Gross
Unrealized
Holding
Losses
January 31, 2013
 
 
 
 
 
 
 
 
 
 
 
Debt securities:
 
 
 
 
 
 
 
 
 
 
 
Corporate
$
766

 
$
(2
)
 
$
—

 
$
—

 
$
766

 
$
(2
)
U.S. Treasury
1,080

 
(3
)
 
—

 
—

 
1,080

 
(3
)
Mortgage-backed
—

 
—

 
1,509

 
(21
)
 
1,509

 
(21
)
Federal agency
1,920

 
(40
)
 
—

 
—

 
1,920

 
(40
)
Equity securities
32

 
(1
)
 
—

 
—

 
32

 
(1
)
 
$
3,798

 
$
(46
)
 
$
1,509

 
$
(21
)
 
$
5,307

 
$
(67
)
 
Less than 12 months
 
12 months or greater
 
Total
 
Fair
Value
 
Gross
Unrealized
Holding
Losses
 
Fair
Value
 
Gross
Unrealized
Holding
Losses
 
Fair
Value
 
Gross
Unrealized
Holding
Losses
July 31, 2012
 
 
 
 
 
 
 
 
 
 
 
Debt securities:
 
 
 
 
 
 
 
 
 
 
 
Mortgage-backed
$
—

 
$
—

 
$
1,504

 
$
(27
)
 
$
1,504

 
$
(27
)
U.S. Treasury
589

 
(1
)
 
—

 
—

 
589

 
(1
)
Corporate
—

 
—

 
462

 
(8
)
 
462

 
(8
)
Equity securities
27

 
(6
)
 
—

 
—

 
27

 
(6
)
 
$
616

 
$
(7
)
 
$
1,966

 
$
(35
)
 
$
2,582

 
$
(42
)
Proceeds and gross gains and losses from the sale of available-for-sale investments
The following table shows the proceeds and gross gains and losses from the sale of available-for-sale investments for the three and six months ended January 31, 2013 and January 31, 2012:
 
Three Months Ended
 
Six Months Ended
 
Jan 31, 2013
 
Jan 31, 2012
 
Jan 31, 2013
 
Jan 31, 2012
Proceeds from sales
$
6,689

 
$
5,180

 
$
12,286

 
$
21,227

Realized gross gains on sales
160

 
115

 
352

 
9,478

Realized gross losses on sales
3

 
—

 
5

 
16