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 |