Segment Reporting (Geographic Sales By Origination And Property, Plant And Equipment) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jul. 31, 2015	Apr. 30, 2015	Jan. 31, 2015	Oct. 31, 2014	Jul. 31, 2014	Apr. 30, 2014	Jan. 31, 2014	Oct. 31, 2013	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2013
Segment Reporting Information [Line Items]
Net Sales	$ 610,578	$ 575,588	$ 588,537	$ 596,510	$ 668,226	$ 624,234	$ 581,622	$ 599,384	$ 2,371,213	$ 2,473,466	$ 2,436,948
Property, Plant & Equipment - Net	470,611				451,665				470,611	451,665	419,280
Domestic Country [Member]
Segment Reporting Information [Line Items]
Net Sales									1,007,253	1,019,926	1,010,934
Property, Plant & Equipment - Net	208,996				196,712				208,996	196,712	166,614
Europe [Member]
Segment Reporting Information [Line Items]
Net Sales									671,296	728,554	678,996
Property, Plant & Equipment - Net	141,738				128,904				141,738	128,904	123,710
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Net Sales									470,661	517,305	546,406
Property, Plant & Equipment - Net	63,775				72,089				63,775	72,089	75,206
Other Credit Derivatives [Member]
Segment Reporting Information [Line Items]
Net Sales									222,003	207,681	200,612
Property, Plant & Equipment - Net	$ 56,102				$ 53,960				$ 56,102	$ 53,960	$ 53,750