GOODWILL AND INTANGIBLE ASSETS (Details 1) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross	$ 352,104	$ 238,439
Accumulated Amortization	109,681	101,196
Net	242,423	137,243
Patents and unpatented technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	165,727	123,707
Accumulated Amortization	66,126	69,992
Net	99,601	53,715
Customer-related intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	165,759	97,016
Accumulated Amortization	33,845	22,425
Net	131,914	74,591
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	16,971	13,291
Accumulated Amortization	7,130	6,166
Net	9,841	7,125
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	3,647	4,425
Accumulated Amortization	2,580	2,613
Net	$ 1,067	$ 1,812