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Income Taxes (Reconciliation Of Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2016
Income Tax Disclosure [Abstract]
Income Tax Examination, Penalties and Interest Expense	$ 1,600	$ 2,000	$ 1,100
Unrecognized tax benefits, beginning balance	76,111	57,032	38,572
Additions based on tax positions related to the current year	0	0	0
Additions for tax positions of prior years	12,394	19,079	18,460
Reductions for tax positions of prior years	0	0	0
Lapse of statute of limitations	(10,263)	0	0
Settlements	0	0	0
Unrecognized tax benefits, ending balance	$ 78,242	$ 76,111	$ 57,032

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The sum of the amounts of estimated penalties and interest recognized in the period arising from income tax examinations.

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Amount of unrecognized tax benefits.

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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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