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, 2014	Nov. 30, 2013	Nov. 30, 2012	Nov. 30, 2010
Allowance for Doubtful Accounts [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Beginning balance	$ 2,250	$ 2,278		$ 5,495
Charge to costs and expenses	365	649	1,031
Write-offs and other	(949)	(688)	(4,543)
Translation adjustments	(20)	11	295
Ending balance	$ 1,646	$ 2,250	$ 2,278	$ 5,495