Segment Reporting (Geographic Sales By Origination And Property, Plant And Equipment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Jul. 31, 2012	Apr. 30, 2012	Jan. 31, 2012	Oct. 31, 2011	Jul. 31, 2011	Apr. 30, 2011	Jan. 31, 2011	Oct. 31, 2010	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2010
Segment Reporting Information [Line Items]
Net Sales	$ 656,833	$ 647,237	$ 580,883	$ 608,295	$ 625,450	$ 594,565	$ 537,105	$ 536,909	$ 2,493,248	$ 2,294,029	$ 1,877,064
Property, Plant & Equipment - Net	384,909				391,502				384,909	391,502	365,892
United States [Member]
Segment Reporting Information [Line Items]
Net Sales									1,064,474	941,218	745,400
Property, Plant & Equipment - Net	146,328				141,584				146,328	141,584	139,717
Europe [Member]
Segment Reporting Information [Line Items]
Net Sales									678,619	653,275	545,803
Property, Plant & Equipment - Net	114,266				131,739				114,266	131,739	122,646
Asia - Pacific [Member]
Segment Reporting Information [Line Items]
Net Sales									572,163	540,874	460,470
Property, Plant & Equipment - Net	80,200				81,035				80,200	81,035	72,950
Other [Member]
Segment Reporting Information [Line Items]
Net Sales									177,992	158,662	125,391
Property, Plant & Equipment - Net	$ 44,115				$ 37,144				$ 44,115	$ 37,144	$ 30,579