ACQUISITION (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended			0 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011	Mar. 01, 2012 Forte Bio [Member]
Business Acquisition [Line Items]
Percent of capital stock acquired				100.00%
Estimated fair values of assets acquired and liabilities assumed
Purchase price				$ 157,811
Cash acquired				15,679
Purchase price, net of cash acquired	21,970	167,638	0	142,132
Accounts receivable				2,477
Inventories				4,200
Other current assets				6,079
Property plant and equipment				1,277
Intangible assets				86,300
Non-current deferred tax assets				8,997
Other non-current assets				110
Total identifiable assets acquired. net of cash acquired				109,440
Deferred tax liabilities				31,681
Other non-current liabilities				3,371
Liabilities assumed				35,052
Goodwill (excess cost over value of net assets acquired)	$ 342,492	$ 338,941		$ 67,744