Intangible Assets And Goodwill (Schedule Of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Nov. 30, 2014	Nov. 30, 2013
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	$ 78,473	$ 64,336
Intangible Assets, Accumulated Amortization	(57,895)	(54,386)
Total	20,578us-gaap_FiniteLivedIntangibleAssetsNet	9,950us-gaap_FiniteLivedIntangibleAssetsNet
Purchased Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	53,789	44,793
Intangible Assets, Accumulated Amortization	(39,575)	(36,712)
Total	14,214	8,081
Customer Related and Other [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	24,684	19,543
Intangible Assets, Accumulated Amortization	(18,320)	(17,674)
Total	$ 6,364	$ 1,869

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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