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Supplementary Balance Sheet Information (Composition Of Property, Plant And Equipment) (Details) - USD ($)
$ in Thousands
Apr. 30, 2016
Jul. 31, 2015
Apr. 30, 2015
Property, Plant and Equipment [Line Items]      
Land and land improvements $ 439,815 $ 431,854 $ 413,775
Buildings and building improvements 1,028,408 1,006,821 957,594
Machinery and equipment 878,730 815,946 777,011
Furniture and fixtures 305,159 286,863 284,403
Software 112,551 106,433 105,482
Vehicles 62,166 61,036 59,708
Construction in progress 28,019 53,158 20,245
Gross property, plant and equipment 2,854,848 2,762,111 2,618,218
Accumulated depreciation (1,484,474) (1,375,836) (1,359,125)
Property, plant and equipment, net $ 1,370,374 $ 1,386,275 $ 1,259,093