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.

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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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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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Restructuring (Narrative) (Details) (USD $)	12 Months Ended
Restructuring (Narrative) (Details) (USD $)	Nov. 30, 2014	Nov. 30, 2013	Nov. 30, 2012
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 2,266,000us-gaap_RestructuringCharges	$ 11,983,000us-gaap_RestructuringCharges	$ 7,204,000us-gaap_RestructuringCharges
2014 Restructuring Activities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	1,664,000
Restructuring Reserve	1,227,000	0
2014 Restructuring Activities [Member] \| Excess Facilities and Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	0
Restructuring Reserve	0	0
2014 Restructuring Activities [Member] \| Employee Severance and Related Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	1,664,000
Restructuring Reserve	1,227,000	0
2013 Restructuring Activities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	396,000	8,720,000
Restructuring Reserve	227,000	1,646,000	0
2013 Restructuring Activities [Member] \| Excess Facilities and Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	329,000	1,126,000
Restructuring Reserve	227,000	569,000	0
2013 Restructuring Activities [Member] \| Employee Severance and Related Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	67,000	7,594,000
Restructuring Reserve	0	1,077,000	0
2012 Restructuring Activities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	234,000	4,297,000
Restructuring Reserve	189,000	906,000	7,032,000
2012 Restructuring Activities [Member] \| Excess Facilities and Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	250,000	1,545,000
Restructuring Reserve	189,000	615,000	603,000
2012 Restructuring Activities [Member] \| Employee Severance and Related Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	(16,000)	2,752,000
Restructuring Reserve	0	291,000	6,429,000
Other Accrued Liabilities [Member] \| 2014 Restructuring Activities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	1,200,000
Other Accrued Liabilities [Member] \| 2013 Restructuring Activities [Member]
Restructuring Cost and Reserve [Line Items]
Short-term restructuring reserves	100,000
Other Accrued Liabilities [Member] \| 2012 Restructuring Activities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	200,000
Noncurrent Liabilities [Member] \| 2013 Restructuring Activities [Member]
Restructuring Cost and Reserve [Line Items]
Long-term restructuring reserves	$ 100,000