Fair Values (Fair Value Of Outstanding Derivatives In Consolidated Balance Sheets) (Details) (Significant Other Observable Inputs (Level 2) [Member], USD $) In Thousands, unless otherwise specified	Apr. 30, 2013		Jul. 31, 2012
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Asset derivatives recorded under the caption Prepaids and other current assets, Foreign exchange contracts	$ 834	[1]	$ 526	[1]
Liability derivatives recorded under the caption Other current liabilities, Foreign exchange contracts	(898)	[1]	(1,424)	[1]
Forward exchange contracts - net liability position	$ (64)	[1]	$ (898)	[1]

[1] Inputs to the valuation methodology of Level 2 assets include quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities in inactive markets; inputs other than quoted prices that are observable for the asset or liability; and inputs that are derived principally from or corroborated by observable market data by correlation or other means.