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Supplementary Balance Sheet Information (Composition Of Property, Plant And Equipment) (Details) - USD ($)
$ in Thousands
Oct. 31, 2016
Jul. 31, 2016
Oct. 31, 2015
Property, Plant and Equipment [Line Items]      
Land and land improvements $ 530,634 $ 440,300 $ 431,798
Buildings and building improvements 1,157,546 1,025,515 1,006,033
Machinery and equipment 954,722 866,008 814,362
Furniture and fixtures 291,141 284,959 289,173
Software 106,901 103,754 107,063
Vehicles 64,344 58,159 61,546
Construction in progress 82,895 39,396 86,042
Gross property, plant and equipment 3,188,183 2,818,091 2,796,017
Accumulated depreciation (1,489,096) (1,454,277) (1,407,452)
Property, plant and equipment, net $ 1,699,087 $ 1,363,814 $ 1,388,565