Intangible Assets and Goodwill (Details 3) (USD $)	3 Months Ended	12 Months Ended				3 Months Ended	12 Months Ended						3 Months Ended	12 Months Ended
	Oct. 31, 2013	Jul. 31, 2013	Oct. 31, 2013 Endoscopy	Jul. 31, 2013 Endoscopy	Jul. 31, 2012 Endoscopy	Oct. 31, 2013 Water Purification and Filtration	Jul. 31, 2013 Water Purification and Filtration	Jul. 31, 2013 Healthcare Disposables	Oct. 31, 2013 Healthcare Disposables	Oct. 31, 2013 Dialysis	Jul. 31, 2013 Dialysis	Jul. 31, 2012 Dialysis	Oct. 31, 2013 Other	Jul. 31, 2013 Other	Oct. 31, 2013 Specialty Packaging segment
Changes in Goodwill
Balance at the beginning of the period	$ 211,618,000	$ 183,655,000	$ 59,230,000	$ 59,230,000	$ 59,230,000	$ 57,179,000	$ 53,288,000	$ 55,864,000	$ 80,108,000	$ 8,133,000	$ 8,133,000	$ 8,133,000	$ 6,968,000	$ 7,140,000	$ 6,866,000
Acquisitions		28,287,000					4,043,000	24,244,000
Foreign currency translation	(189,000)	(324,000)				(87,000)	(152,000)						(102,000)	(172,000)
Balance at the end of the period	$ 211,429,000	$ 211,618,000	$ 59,230,000	$ 59,230,000	$ 59,230,000	$ 57,092,000	$ 57,179,000	$ 80,108,000	$ 80,108,000	$ 8,133,000	$ 8,133,000	$ 8,133,000	$ 6,866,000	$ 6,968,000	$ 6,866,000
Assumed compounded annual sales growth impacting the impairment assessments (as a percent)															10.70%