Nature Of Business And Summary Of Significant Accounting Policies (Allowances Against Accounts Receivable) (Details) (Allowance for Doubtful Accounts [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Nov. 30, 2013	Nov. 30, 2012	Nov. 30, 2011
Allowance for Doubtful Accounts [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Beginning balance	$ 2,278	$ 5,495	$ 3,769
Charge to costs and expenses	649	1,031	1,963
Write-offs and other	(688)	(4,543)	(94)
Translation adjustments	(11)	(295)	143
Ending balance	$ 2,250	$ 2,278	$ 5,495