FAIR VALUE MEASUREMENTS (Details) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2013	Jul. 31, 2012
Available-for-sale securities:
Securities	$ 70,744	$ 75,821
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member]
Derivative financial instruments:
Foreign exchange forward contracts	301	3,778
Derivative financial instruments:
Foreign exchange forward contracts	3,066	1,457
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member] | Equity Securities [Member]
Available-for-sale securities:
Securities	366	206
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member] | Corporate Debt Securities [Member]
Available-for-sale securities:
Securities	32,393	32,378
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member] | U.S. Treasury [Member]
Available-for-sale securities:
Securities	11,543	8,610
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member] | Federal Agency [Member]
Available-for-sale securities:
Securities	20,642	27,231
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member] | Municipal government [Member]
Available-for-sale securities:
Securities		1,004
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member] | Mortgage-backed [Member]
Available-for-sale securities:
Securities	5,990	6,392
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
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	366	206
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] | Municipal government [Member]
Available-for-sale securities:
Securities		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]
Derivative financial instruments:
Foreign exchange forward contracts	301	3,778
Derivative financial instruments:
Foreign exchange forward contracts	3,066	1,457
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	32,393	32,378
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | U.S. Treasury [Member]
Available-for-sale securities:
Securities	11,543	8,610
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Federal Agency [Member]
Available-for-sale securities:
Securities	20,642	27,231
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Municipal government [Member]
Available-for-sale securities:
Securities		1,004
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Mortgage-backed [Member]
Available-for-sale securities:
Securities	5,990	6,392
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
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] | Municipal government [Member]
Available-for-sale securities:
Securities		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 Measurement [Member]
Financial assets carried at fair value
Money market funds	6,404	4,684
Money Market Funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Financial assets carried at fair value
Money market funds	6,404	4,684
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