GOODWILL AND INTANGIBLE ASSETS (Details 1) (USD $) In Thousands, unless otherwise specified	Oct. 31, 2013	Jul. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross	$ 236,119	$ 238,439
Accumulated Amortization	95,432	101,196
Net	140,687	137,243
Patents and unpatented technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	113,558	123,707
Accumulated Amortization	61,330	69,992
Net	52,228	53,715
Customer-related intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	105,528	97,016
Accumulated Amortization	25,226	22,425
Net	80,302	74,591
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	13,357	13,291
Accumulated Amortization	6,403	6,166
Net	6,954	7,125
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	3,676	4,425
Accumulated Amortization	2,473	2,613
Net	$ 1,203	$ 1,812