NOTES PAYABLE AND LONG-TERM DEBT (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2012		Jul. 31, 2011		Jul. 31, 2010
Debt Disclosure [Abstract]
Interest expense	$ 28,704	[1]	$ 26,055	[1]	$ 19,910	[1]
Interest income	8,527		7,152		5,586
Interest expense, net	$ 20,177		$ 18,903		$ 14,324

[1] For fiscal years 2012, 2011 and 2010, interest expense was increased/(reduced) by $1,653, $(485) and $(6,807), respectively, related to Income taxes payable. See Note 11, Income Taxes for further discussion.