OTHER CURRENT AND NON-CURRENT ASSETS (Details 2) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Cost/ Amortized Cost Basis	$ 66,622	$ 68,623
Fair Value	69,839	70,744
Gross Unrealized Holding Gains	3,224	2,937
Gross Unrealized Holding Losses	(7)	(816)
Net Unrealized Holding Gains	3,217	2,121
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Equity Securities, Cost/Amortized Cost Basis	4,160	176
Equity Securities, Fair Value	4,748	176
Equity Securities, Gross Unrealized Holding Gains	588	0
Equity Securities, Gross Unrealized Holdings Losses	0	0
Equity Securities, Net Unrealized Holding Gains	588	0
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt Securities, Cost/Amortized Cost Basis	28,987	31,546
Debt Securities, Fair Value	30,243	32,393
Debt Securities, Gross Unrealized Holding Gains	1,259	1,274
Debt Securities, Gross Unrealized Holdings Losses	(3)	(427)
Debt Securities, Net Unrealized Holding Gains	1,256	847
U.S. Treasury [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt Securities, Cost/Amortized Cost Basis	9,478	11,339
Debt Securities, Fair Value	9,724	11,543
Debt Securities, Gross Unrealized Holding Gains	246	294
Debt Securities, Gross Unrealized Holdings Losses	0	(90)
Debt Securities, Net Unrealized Holding Gains	246	204
Federal Agency [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt Securities, Cost/Amortized Cost Basis	12,778	19,810
Debt Securities, Fair Value	13,719	20,642
Debt Securities, Gross Unrealized Holding Gains	941	1,131
Debt Securities, Gross Unrealized Holdings Losses	0	(299)
Debt Securities, Net Unrealized Holding Gains	941	832
Mortgage-backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt Securities, Cost/Amortized Cost Basis	11,219	5,752
Debt Securities, Fair Value	11,405	5,990
Debt Securities, Gross Unrealized Holding Gains	190	238
Debt Securities, Gross Unrealized Holdings Losses	(4)	0
Debt Securities, Net Unrealized Holding Gains	$ 186	$ 238