INVESTMENT SECURITIES (Tables)

3 Months Ended

Oct. 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 benefits protection trusts at October 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)
October 31, 2013
Equity securities	$	185	$	185	$	—	$	—		$	—
Debt securities:
Corporate	29,913		30,749		1,262		(426		)	836
U.S. Treasury	11,120		11,287		260		(93		)	167
Federal agency	19,285		20,086		1,105		(304		)	801
Mortgage-backed	5,751		5,975		229		(5		)	224
Commercial Paper	1,698		1,699		1		—			1
	$	67,952	$	69,981	$	2,857	$	(828	)	$	2,029
July 31, 2013
Equity securities	$	176	$	176	$	—	$	—		$	—
Debt securities:
Corporate	31,546		32,393		1,274		(427		)	847
U.S. Treasury	11,339		11,543		294		(90		)	204
Federal agency	19,810		20,642		1,131		(299		)	832
Mortgage-backed	5,752		5,990		238		—			238
	$	68,623	$	70,744	$	2,937	$	(816	)	$	2,121

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
October 31, 2013
Debt securities:
Corporate	$	8,792	$	(426	)	$	—	$	—	$	8,792	$	(426	)
U.S. Treasury	4,391		(93		)	—		—		4,391		(93		)
Mortgage-backed	1,501		(5		)	—		—		1,501		(5		)
Federal agency	3,601		(304		)	—		—		3,601		(304		)
	$	18,285	$	(828	)	$	—	$	—	$	18,285	$	(828	)

	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, 2013
Debt securities:
Corporate	10,990		(427		)	—		—		10,990		(427		)
U.S. Treasury	3,778		(90		)	—		—		3,778		(90		)
Federal Agency	3,701		(299		)	—		—		3,701		(299		)
	$	18,469	$	(816	)	$	—	$	—	$	18,469	$	(816	)

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 months ended October 31, 2013 and October 31, 2012:

	Three Months Ended
	Oct 31, 2013		Oct 31, 2012
Proceeds from sales	$	500	$	5,597
Realized gross gains on sales	—		192
Realized gross losses on sales	1		2

Trading Securities [Table Text Block]

The following is a summary of the Company’s trading securities by category which are classified within other non-current assets in the Company’s condensed consolidated balance sheets.

	Oct 31, 2013		Jul 31, 2013
Equity securities	$	199	$	190
Corporate debt securities	2		—
Total trading securities	$	201	$	190

The following table shows the net gains and losses recognized on trading securities for the three months ended October 31, 2013 and October 31, 2012:

	Three Months Ended
	Oct 31, 2013		Oct 31, 2012
Gains/(losses), net recognized for securities held	$	16	$	—
Gains/(losses), net recognized for securities sold	—		—
Total gains/(losses), net recognized	$	16	$	—