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Income Taxes (Net Current And Non-Current Components Of Deferred Income Taxes) (Details) - USD ($) $ in Thousands | Jul. 31, 2015 | Jul. 31, 2014
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Income Tax Disclosure [Abstract] |  |
Net current deferred income tax asset | $ 27,962 | $ 29,249
Net non-current deferred income tax asset | 0 | 0
Net non-current deferred income tax liability | 147,796 | 128,562
Net deferred income tax liability | $ 119,834 | $ 99,313

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