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Supplementary Balance Sheet Information (Composition Of Property, Plant And Equipment) (Details) (USD $)
In Thousands, unless otherwise specified
Apr. 30, 2014
Jul. 31, 2013
Apr. 30, 2013
Balance Sheet Related Disclosures [Abstract]      
Land and land improvements $ 350,674 $ 343,982 $ 295,559
Buildings and building improvements 908,829 884,307 852,483
Machinery and equipment 701,825 646,102 599,199
Furniture and fixtures 273,202 259,693 254,671
Software 99,958 92,553 91,987
Vehicles 55,324 49,356 48,592
Construction in progress 19,453 49,102 27,273
Gross property, plant and equipment 2,409,265 2,325,095 2,169,764
Accumulated depreciation (1,244,878) (1,155,807) (1,129,857)
Property, plant and equipment, net $ 1,164,387 $ 1,169,288 $ 1,039,907