Financial Instruments (Impact On Accumulated Other Comprehensive Income (Loss) And Earnings From Foreign Exchange Contracts That Qualified As Cash Flow Hedges) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011
Financial Instruments [Abstract]
Net carrying amount at beginning of year	$ (373)	$ 241
Cash flow hedges deferred in OCI	672	2,229
Cash flow hedges reclassified to income (effective portion)	81	(2,960)
Change in deferred taxes	(196)	117	(280)
Net carrying amount at July 31	$ (184)	$ (373)	$ 241