FAIR VALUE MEASUREMENTS (Details) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2014	Jul. 31, 2013
Available-for-sale securities:
Securities	$ 71,217	$ 70,744
Trading Securities [Abstract]
Trading Securities	788	190
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Trading Securities [Abstract]
Trading Securities	788	190
Derivative financial instruments:
Foreign exchange forward contracts	3,555	301
Derivative financial instruments:
Foreign exchange forward contracts	689	3,066
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Equity Securities [Member]
Available-for-sale securities:
Securities	4,524	176
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Corporate Debt Securities [Member]
Available-for-sale securities:
Securities	30,359	32,393
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. Treasury [Member]
Available-for-sale securities:
Securities	10,416	11,543
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Federal Agency [Member]
Available-for-sale securities:
Securities	16,374	20,642
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Mortgage-backed [Member]
Available-for-sale securities:
Securities	9,544	5,990
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Trading Securities [Abstract]
Trading Securities	788	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	4,524	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 2 [Member]
Trading Securities [Abstract]
Trading Securities	0	0
Derivative financial instruments:
Foreign exchange forward contracts	3,555	301
Derivative financial instruments:
Foreign exchange forward contracts	689	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	30,359	32,393
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | U.S. Treasury [Member]
Available-for-sale securities:
Securities	10,416	11,543
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Federal Agency [Member]
Available-for-sale securities:
Securities	16,374	20,642
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Mortgage-backed [Member]
Available-for-sale securities:
Securities	9,544	5,990
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
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	3,948	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	3,948	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