Intangibles and Goodwill (Details 3) (USD $)	12 Months Ended				12 Months Ended							12 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2012 Endoscopy	Jul. 31, 2013 Endoscopy	Jul. 31, 2013 Water Purification and Filtration	Jul. 31, 2012 Water Purification and Filtration	Jul. 31, 2013 Healthcare Disposables	Jul. 31, 2011 Healthcare Disposables	Jul. 31, 2013 Dialysis	Jul. 31, 2012 Dialysis	Jul. 31, 2011 Dialysis	Jul. 31, 2013 Other	Jul. 31, 2012 Other	Jul. 31, 2013 Specialty Packaging segment
Changes in Goodwill
Balance at the beginning of the period	$ 183,655,000	$ 134,770,000	$ 9,648,000	$ 59,230,000	$ 53,288,000	$ 53,597,000	$ 55,864,000	$ 55,864,000	$ 8,133,000	$ 8,133,000	$ 8,133,000	$ 7,140,000	$ 7,528,000	$ 6,968,000
Acquisitions	28,287,000	49,582,000	49,582,000		4,043,000		24,244,000
Foreign currency translation	(324,000)	(697,000)			(152,000)	(309,000)						(172,000)	(388,000)
Balance at the end of the period	$ 211,618,000	$ 183,655,000	$ 59,230,000	$ 59,230,000	$ 57,179,000	$ 53,288,000	$ 80,108,000	$ 55,864,000	$ 8,133,000	$ 8,133,000	$ 8,133,000	$ 6,968,000	$ 7,140,000	$ 6,968,000
Assumed compounded annual sales growth impacting the impairment assessments (as a percent)														10.70%