Supplementary Balance Sheet Information (Composition Of Property, Plant And Equipment) (Details) - USD ($) $ in Thousands	Jan. 31, 2016	Jul. 31, 2015	Jan. 31, 2015
Property, Plant and Equipment [Line Items]
Land and land improvements	$ 438,373	$ 431,854	$ 411,148
Buildings and building improvements	1,024,065	1,006,821	959,863
Machinery and equipment	873,045	815,946	774,791
Furniture and fixtures	302,077	286,863	281,869
Software	111,118	106,433	104,511
Vehicles	62,093	61,036	58,760
Construction in progress	24,767	53,158	16,676
Gross property, plant and equipment	2,835,538	2,762,111	2,607,618
Accumulated depreciation	(1,443,649)	(1,375,836)	(1,323,403)
Property, plant and equipment, net	$ 1,391,889	$ 1,386,275	$ 1,284,215