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Restructuring Charges (Narrative) (Details) (USD $)	3 Months Ended					3 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2014 2013 Restructuring Activities [Member]	Nov. 30, 2013 2013 Restructuring Activities [Member]	Feb. 28, 2014 2013 Restructuring Activities [Member] Other accrued liabilities [Member]	Feb. 28, 2014 2012 Restructuring Activities [Member]	Nov. 30, 2013 2012 Restructuring Activities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 196,000	$ 960,000	$ 159,000			$ 37,000
Restructuring reserve			571,000	1,646,000	400,000	572,000	906,000
Short-term restructuring reserves						500,000
Long-term restructuring reserves			$ 200,000			$ 100,000

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- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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