Derivative Instruments And Hedging Activities (Schedule Of Total Gross Notional Amounts, Presented By Currency) (Details) - Derivatives Designated As Hedging Instruments - USD ($) $ in Thousands	Apr. 30, 2016	Oct. 31, 2015
Derivative
Total gross notional amounts, presented by currency	$ 85,032	$ 169,886
United Kingdom, Pounds
Derivative
Total gross notional amounts, presented by currency	21,936	46,330
Euro Member Countries, Euro
Derivative
Total gross notional amounts, presented by currency	21,311	40,961
India, Rupees
Derivative
Total gross notional amounts, presented by currency	17,668	35,647
China, Yuan Renminbi
Derivative
Total gross notional amounts, presented by currency	7,418	15,129
Singapore, Dollars
Derivative
Total gross notional amounts, presented by currency	6,943	13,745
Japan, Yen
Derivative
Total gross notional amounts, presented by currency	4,985	8,809
Switzerland, Francs
Derivative
Total gross notional amounts, presented by currency	$ 4,771	$ 9,265