Amount of costs incurred to date for the specified type of restructuring cost.

Amount expected to be charged against earnings in the current and future periods for the specified restructuring cost.

Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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- Definition

Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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- Definition

Carrying amount as of the balance sheet date of known and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid after one year or beyond the next operating cycle, if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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Restructuring Charges (Narrative) (Details) (USD $)	3 Months Ended				3 Months Ended			3 Months Ended		3 Months Ended
Restructuring Charges (Narrative) (Details) (USD $)	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2013 2012 Restructuring Activities [Member]	Nov. 30, 2012 2012 Restructuring Activities [Member]	Feb. 28, 2013 2012 Restructuring Activities [Member] Income (loss) from discontinued operations [Member]	Feb. 28, 2013 2012 Restructuring Activities [Member] Excess Facilities and Other Costs [Member]	Nov. 30, 2012 2012 Restructuring Activities [Member] Excess Facilities and Other Costs [Member]	Feb. 28, 2013 2012 Restructuring Activities [Member] Employee Severance and Related Benefits [Member]	Nov. 30, 2012 2012 Restructuring Activities [Member] Employee Severance and Related Benefits [Member]	Feb. 28, 2013 2010 Restructuring Activities [Member]	Feb. 28, 2013 2010 Restructuring Activities [Member] Excess Facilities and Other Costs [Member]	Feb. 28, 2013 2010 Restructuring Activities [Member] Employee Severance and Related Benefits [Member]	Nov. 30, 2012 2010 Restructuring Activities [Member] Employee Severance and Related Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 960,000	$ 0	$ 1,375,000		$ 400,000	$ 962,000		$ 413,000		$ 0
Restructuring cumulative expenses			20,400,000			3,600,000		16,800,000		43,300,000	8,000,000	35,300,000
Expected restructuring costs						5,100,000		19,700,000
Short-term restructuring reserves			2,300,000
Long-term restructuring reserves			300,000
Restructuring reserve			$ 2,552,000	$ 7,032,000		$ 1,161,000	$ 603,000	$ 1,391,000	$ 6,429,000			$ 200,000	$ 300,000