Derivative Financial Instruments And Hedging Activities (Fair Value Of Derivative Instruments Located On Consolidated Balance Sheets) (Details) (Forward Foreign Exchange Contracts [Member], USD $) In Thousands, unless otherwise specified	Nov. 30, 2011	Nov. 30, 2010
Derivatives Designated As Hedging Instruments [Member] | Prepaid Expenses And Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Forward foreign exchange contracts, Asset Derivatives	$ 358	$ 645
Derivatives Designated As Hedging Instruments [Member] | Other Accrued Expense [Member]
Derivatives, Fair Value [Line Items]
Forward foreign exchange contracts, Liability Derivatives	3,613	636
Derivatives Not Designated As Hedging Instruments [Member] | Prepaid Expenses And Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Forward foreign exchange contracts, Asset Derivatives	5,608	9,541
Derivatives Not Designated As Hedging Instruments [Member] | Other Accrued Expense [Member]
Derivatives, Fair Value [Line Items]
Forward foreign exchange contracts, Liability Derivatives	$ 6,671	$ 5,964