COMMON STOCK (Details 1) (USD $) In Thousands	12 Months Ended
	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2009
Excess tax benefits in cash flows from financing activities	$ 12,777	$ 2,671	$ 457
Tax benefit recognized related to total stock-based compensation expense	8,457	7,159	6,288
Actual tax benefit realized for tax deductions from option exercises of stock-based payment arrangements	$ 23,074	$ 8,301	$ 3,949