FAIR VALUE MEASUREMENTS (Details) (USD $) In Thousands, unless otherwise specified	Oct. 31, 2013	Jul. 31, 2013
Available-for-sale securities:
Securities	$ 69,981	$ 70,744
Trading Securities [Abstract]
Trading Securities	201	190
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Trading Securities [Abstract]
Trading Securities	201	190
Derivative financial instruments:
Foreign exchange forward contracts	1,180	301
Derivative financial instruments:
Foreign exchange forward contracts	1,395	3,066
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Equity Securities [Member]
Available-for-sale securities:
Securities	185	176
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Corporate Debt Securities [Member]
Available-for-sale securities:
Securities	30,749	32,393
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. Treasury [Member]
Available-for-sale securities:
Securities	11,287	11,543
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Federal Agency [Member]
Available-for-sale securities:
Securities	20,086	20,642
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Mortgage-backed [Member]
Available-for-sale securities:
Securities	5,975	5,990
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial Paper [Member]
Available-for-sale securities:
Securities	1,699
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Trading Securities [Abstract]
Trading Securities	199	190
Derivative financial instruments:
Foreign exchange forward contracts	0	0
Derivative financial instruments:
Foreign exchange forward contracts	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member]
Available-for-sale securities:
Securities	185	176
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Corporate Debt Securities [Member]
Available-for-sale securities:
Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | U.S. Treasury [Member]
Available-for-sale securities:
Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Federal Agency [Member]
Available-for-sale securities:
Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Mortgage-backed [Member]
Available-for-sale securities:
Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Commercial Paper [Member]
Available-for-sale securities:
Securities	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Trading Securities [Abstract]
Trading Securities	2	0
Derivative financial instruments:
Foreign exchange forward contracts	1,180	301
Derivative financial instruments:
Foreign exchange forward contracts	1,395	3,066
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Equity Securities [Member]
Available-for-sale securities:
Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member]
Available-for-sale securities:
Securities	30,749	32,393
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | U.S. Treasury [Member]
Available-for-sale securities:
Securities	11,287	11,543
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Federal Agency [Member]
Available-for-sale securities:
Securities	20,086	20,642
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Mortgage-backed [Member]
Available-for-sale securities:
Securities	5,975	5,990
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial Paper [Member]
Available-for-sale securities:
Securities	1,699
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Trading Securities [Abstract]
Trading Securities	0	0
Derivative financial instruments:
Foreign exchange forward contracts	0	0
Derivative financial instruments:
Foreign exchange forward contracts	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Equity Securities [Member]
Available-for-sale securities:
Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Corporate Debt Securities [Member]
Available-for-sale securities:
Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | U.S. Treasury [Member]
Available-for-sale securities:
Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Federal Agency [Member]
Available-for-sale securities:
Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Mortgage-backed [Member]
Available-for-sale securities:
Securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Commercial Paper [Member]
Available-for-sale securities:
Securities	0
Money Market Funds [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Financial assets carried at fair value
Money market funds	2,786	6,404
Money Market Funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Financial assets carried at fair value
Money market funds	2,786	6,404
Money Market Funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Financial assets carried at fair value
Money market funds	0	0
Money Market Funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Financial assets carried at fair value
Money market funds	$ 0	$ 0