ACCOUNTS RECEIVABLE (Details) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2013	Jul. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	$ 581,235	$ 667,169
Less: allowance for doubtful accounts	(14,900)	(11,733)
Accounts receivable	566,335	655,436
Billed [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	508,448	584,449
Unbilled [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	$ 72,787	$ 82,720