ACQUISITIONS (Details Textuals) (USD $)	12 Months Ended					12 Months Ended		0 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2014 Medistad and Solohill [Member]	Jul. 31, 2014 SoloHill [Member]	Jul. 31, 2014 ATMI LifeSciences [Member]	Jul. 31, 2014 Filter Specialists, Inc. [Member]	Mar. 01, 2012 Forte Bio [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross				$ 30,677,000
Contingent Consideration					3,000,000
Cash Payments for Purchase Price						185,000,000	124,000,000
Working Capital Adjustments						5,793,000	3,347,000
Goodwill (excess cost over value of net assets acquired)	150,749,000
Payments to Acquire Businesses, Net of Cash Acquired	$ 318,978,000	$ 21,970,000	$ 167,638,000					$ 142,132,000