GOODWILL AND INTANGIBLE ASSETS (Details 1) (USD $) In Thousands, unless otherwise specified	Oct. 31, 2014	Jul. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross	$ 346,139	$ 352,104
Accumulated Amortization	114,076	109,681
Net	232,063	242,423
Patents and unpatented technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	163,125	165,727
Accumulated Amortization	67,618	66,126
Net	95,507	99,601
Customer-related intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	162,679	165,759
Accumulated Amortization	36,506	33,845
Net	126,173	131,914
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	16,763	16,971
Accumulated Amortization	7,379	7,130
Net	9,384	9,841
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	3,572	3,647
Accumulated Amortization	2,573	2,580
Net	$ 999	$ 1,067