GOODWILL AND INTANGIBLE ASSETS (Details 1) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2014	Jul. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross	$ 315,975	$ 238,439
Accumulated Amortization	104,389	101,196
Net	211,586	137,243
Patents and unpatented technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	166,112	123,707
Accumulated Amortization	64,522	69,992
Net	101,590	53,715
Customer-related intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	129,777	97,016
Accumulated Amortization	30,480	22,425
Net	99,297	74,591
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	16,412	13,291
Accumulated Amortization	6,835	6,166
Net	9,577	7,125
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	3,674	4,425
Accumulated Amortization	2,552	2,613
Net	$ 1,122	$ 1,812