BALANCE SHEET DETAILS (Details) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2012	Jul. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 604,757	$ 655,152
Less: Allowance for doubtful accounts	(9,847)	(8,383)
Accounts receivable	594,910	646,769
Billed Revenues [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	514,976	553,500
Unbilled [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 89,781	$ 101,652