BALANCE SHEET DETAILS (Details) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2012	Jul. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 624,206	$ 655,152
Less: Allowance for doubtful accounts	(9,306)	(8,383)
Accounts receivable	614,900	646,769
Billed Revenues [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	546,916	553,500
Unbilled [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 77,290	$ 101,652