GOODWILL AND INTANGIBLE ASSETS (Details 1) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2013	Jul. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Gross	$ 239,710	$ 238,122
Accumulated Amortization	95,898	86,978
Net	143,812	151,144
Patents and unpatented technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	126,714	125,938
Accumulated Amortization	69,079	65,262
Net	57,635	60,676
Customer-related intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	95,222	93,901
Accumulated Amortization	18,484	13,323
Net	76,738	80,578
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	13,278	13,104
Accumulated Amortization	5,788	5,269
Net	7,490	7,835
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	4,496	5,179
Accumulated Amortization	2,547	3,124
Net	$ 1,949	$ 2,055