DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2012	Jul. 31, 2011
Long-Term Debt [Member]
Nonderivative instruments designated as hedging instruments
Net investment hedge	$ 112,128	$ 115,803
Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives not designated as hedging instruments
Derivative Asset, Fair Value, Gross Asset	2,679	1,456
Derivative Assets, Current	2,679	1,456
Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivatives not designated as hedging instruments
Derivative Liability, Fair Value, Gross Liability	567	478
Derivative Liabilities, Current	$ 567	$ 478