INVESTMENT SECURITIES (Tables)

9 Months Ended

Apr. 30, 2014

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 April 30, 2014 range from 2014 to 2046.

	Cost/ Amortized Cost Basis		Fair Value		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Net Unrealized Holding Gains/(Losses)
April 30, 2014
Equity securities	$	5,029	$	4,524	$	5	$	(510	)	$	(505	)
Debt securities:
Corporate	29,435		30,359		1,172		(248		)	924
U.S. Treasury	10,310		10,416		215		(109		)	106
Federal agency	16,075		16,374		878		(579		)	299
Mortgage-backed	9,366		9,544		189		(11		)	178
	$	70,215	$	71,217	$	2,459	$	(1,457	)	$	1,002
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
April 30, 2014
Debt securities:
Corporate	$	8,865	$	(248	)	$	—	$	—		$	8,865	$	(248	)
U.S. Treasury	4,372		(109		)	—		—			4,372		(109		)
Federal agency	1,634		(63		)	1,598		(516		)	3,232		(579		)
Mortgage-backed	1,109		(11		)	—		—			1,109		(11		)
Equity securities	4,326		(510		)	—		—			4,326		(510		)
	$	20,306	$	(941	)	$	1,598	$	(516	)	$	21,904	$	(1,457	)

	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 and nine months ended April 30, 2014 and April 30, 2013:

	Three Months Ended				Nine Months Ended
	Apr 30, 2014		Apr 30, 2013		Apr 30, 2014		Apr 30, 2013
Proceeds from sales	$	4,915	$	883	$	7,973	$	13,169
Realized gross gains on sales	93		18		177		370
Realized gross losses on sales	6		—		106		5

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.

	Apr 30, 2014		Jul 31, 2013
Equity securities	$	788	$	190
Total trading securities	$	788	$	190

The following table shows the net gains and losses recognized on trading securities for the three and nine months ended April 30, 2014 and April 30, 2013:

	Three Months Ended					Nine Months Ended
	Apr 30, 2014			Apr 30, 2013		Apr 30, 2014		Apr 30, 2013
Gains/(losses), net recognized for securities held	$	(1	)	$	—	$	22	$	—
Gains/(losses), net recognized for securities sold	—			—		—		—
Total gains/(losses), net recognized	$	(1	)	$	—	$	22	$	—