Fair Values (Fair Value Of Financial Assets And Liabilities) (Details) (Significant Other Observable Inputs (Level 2) [Member], USD $) In Thousands, unless otherwise specified	Jan. 31, 2012		Jul. 31, 2011
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Forward exchange contracts - net asset (liability) position	$ 786	[1]	$ (525)	[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.