STOCK-BASED PAYMENT (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 30, 2012	Apr. 30, 2011	Apr. 30, 2012	Apr. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation	$ 8,996	$ 8,360	$ 26,199	$ 20,378
Restricted stock units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	4,541	4,145	13,880	10,177
Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	2,013	2,100	5,208	4,078
ESPP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	1,415	1,118	3,980	3,180
MSPP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	$ 1,027	$ 997	$ 3,131	$ 2,943