Fair Value (Fair Value Of Financial Assets And Liabilities) (Details) (USD $) In Thousands	Jul. 31, 2011		Jul. 31, 2010
Forward exchange contracts - net liability position	$ (1,470)		$ (2,127)
Significant Observable Inputs (Level 2) [Member]
Forward exchange contracts - net liability position	(525)	[1]	(1,320)	[1]
Interest rate swaps - net asset position			$ 4,590	[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.