Fair Value Measurements And Derivative Instruments (Foreign Currency Forward Contracts Not Designated As Hedging Instruments) (Details) (USD $) In Thousands, unless otherwise specified	Nov. 30, 2011	Nov. 30, 2010
Other Current Assets [Member]
Fair Value Measurements and Derivative Instruments [Line Items]
Foreign currency forward contracts, Assets	$ 142	$ 991
Accrued Liabilities [Member]
Fair Value Measurements and Derivative Instruments [Line Items]
Foreign currency forward contracts, Liabilities	$ 142	$ 53

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents contracts related to the exchange of different currencies, including foreign currency options, forward (delivery or nondelivery) contracts, and swaps entered into and existing as of the balance sheet date.

No definition available.

Name:	us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant