OTHER CURRENT AND NON-CURRENT ASSETS (Details Textuals) (USD $) In Thousands	Jul. 31, 2011	Jul. 31, 2010
Fair value of the company's asset relating to the defined benefit plans	$ 102,152	$ 90,031
Retirement related liabilities associated with the assets held in the benefits protection trust	100,157	86,345
Noncurent Investment available for the sale	11,779	4,667
Benefit Protection [Member]
Retirement benefit assets related to Benefits Protection Trust	81,160	70,278
Available-for-sale Securities	79,979	69,287
German Plans [Member]
Fair value of the company's asset relating to the defined benefit plans	20,992	19,753
Fair value of the company's liability relating to the defined benefit plans	55,859	52,063
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Retirement benefit assets related to Benefits Protection Trust	76,000	62,669
Investment In Satair [Member]
Noncurent Investment available for the sale	$ 11,044	$ 4,209