INVESTMENT SECURITIES

6 Months Ended

Jan. 31, 2012

Investments, Debt and Equity Securities [Abstract]

INVESTMENT SECURITIES

INVESTMENT SECURITIES

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, 2012 range from 2012 to 2044.

	Cost/ Amortized Cost Basis		Fair Value		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Net Unrealized Holding Gains
January 31, 2012
Equity securities	$	1,011	$	1,014	$	3	$	—		$	3
Debt securities:
Corporate	29,799		31,710		1,945		(34		)	1,911
U.S. Treasury	8,821		9,694		873		—			873
Federal agency	27,120		28,962		1,842		—			1,842
Mortgage-backed	6,155		6,340		215		(30		)	185
Municipal government	1,000		1,000		—		—			—
	$	73,906	$	78,720	$	4,878	$	(64	)	$	4,814
July 31, 2011
Equity securities	$	2,381	$	12,064	$	9,683	$	—		$	9,683
Debt securities:
Corporate	30,239		32,020		1,814		(33		)	1,781
U.S. Treasury	9,544		10,210		666		—			666
Federal agency	28,042		29,404		1,362		—			1,362
Mortgage-backed	6,242		6,356		144		(30		)	114
Municipal government	1,000		1,002		2		—			2
	$	77,448	$	91,056	$	13,671	$	(63	)	$	13,608

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, 2012
Debt securities:
Mortgage-backed	$	697	$	3	$	1,505	$	27	$	2,202	$	30
Corporate	2,589		34		—		—		2,589		34
	$	3,286	$	37	$	1,505	$	27	$	4,791	$	64

	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, 2011
Debt securities:
Mortgage-backed	$	1,502	$	30	$	—	$	—	$	1,502	$	30
Corporate	1,985		33		—		—		1,985		33
	$	3,487	$	63	$	—	$	—	$	3,487	$	63

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, 2012 and January 31, 2011:

	Three Months Ended				Six Months Ended
	Jan 31, 2012		Jan 31, 2011		Jan 31, 2012		Jan 31, 2011
Proceeds from sales	$	5,180	$	10,670	$	21,227	$	14,212
Realized gross gains on sales	115		514		9,478		694
Realized gross losses on sales	—		12		16		12