Stock Compensation Plan (Schedule Of Share Based Compensation Valuation Model) (Details)	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	41.20%	42.60%	42.80%
Expected dividends	1.20%	0.00%	0.00%
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (average in years)	5 years 6 months	5 years 11 months 20 days	5 years 26 days
Risk-free rate, minimum	0.10%	0.20%	0.10%
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (average in years)	5 years 10 months 23 days	6 years 2 months 21 days	5 years 3 months 26 days
Risk-free rate, maximum	2.80%	1.60%	2.20%