Intangible Assets and Goodwill (Schedule Of Intangible Assets) (Details) - USD ($) $ in Thousands	Feb. 29, 2020	Nov. 30, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 295,968	$ 295,968
Accumulated Amortization	(202,353)	(196,576)
Net Book Value	93,615	99,392
Purchased technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	135,186	135,186
Accumulated Amortization	(107,612)	(105,967)
Net Book Value	27,574	29,219
Customer-related
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	134,042	134,042
Accumulated Amortization	(77,633)	(74,175)
Net Book Value	56,409	59,867
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	24,740	24,740
Accumulated Amortization	(16,551)	(16,043)
Net Book Value	8,189	8,697
Non-compete agreement
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,000	2,000
Accumulated Amortization	(557)	(391)
Net Book Value	$ 1,443	$ 1,609

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/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
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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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004

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