Financial Instruments (Impact On Accumulated Other Comprehensive Loss And Earnings From Foreign Exchange Contracts That Qualified As Cash Flow Hedges) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Oct. 31, 2013	Oct. 31, 2012
Financial Instruments [Abstract]
Net carrying amount at beginning of year	$ (184)	$ (373)
Cash flow hedges deferred in other comprehensive income	(297)	(786)
Cash flow hedges reclassified to income (effective portion)	(41)	399
Change in deferred taxes	175	109
Net carrying amount at October 31	$ (347)	$ (651)