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Nature Of Business And Summary Of Significant Accounting Policies (Allowances Against Accounts Receivable) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Nov. 30, 2012	Nov. 30, 2011	Nov. 30, 2010
Allowance for Doubtful Accounts Receivable [Roll Forward]
Beginning balance	$ 6,683	$ 4,980	$ 7,650
Charge (benefit) to costs and expenses	1,140	1,963	(1,400)
Write-offs and other	(5,094)	(117)	(981)
Translation adjustments	295	(143)	(289)
Ending balance	$ 3,024	$ 6,683	$ 4,980

Amount of the current period expense charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected).

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