GOODWILL AND INTANGIBLE ASSETS (Details Textuals) (USD $) In Thousands	12 Months Ended
	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2009
Amortization expense for Intangible assets	$ 13,645	$ 11,534	$ 9,751
Estimated amortization expense for intangible assets	14,468
Estimated amortization expense for intangible assets	9,654
Estimated amortization expense for intangible assets	7,765
Estimated amortization expense for intangible assets	6,254
Estimated amortization expense for intangible assets	$ 5,058