Intangible Assets and Goodwill (Schedule Of Intangible Assets) (Details) - USD ($) $ in Thousands	Aug. 31, 2019	Nov. 30, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 343,183	$ 239,843
Accumulated Amortization	(206,802)	(180,924)
Net Book Value	136,381	58,919
Purchased technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	179,601	154,301
Accumulated Amortization	(121,937)	(110,959)
Net Book Value	57,664	43,342
Customer-related
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	134,242	67,802
Accumulated Amortization	(68,454)	(56,589)
Net Book Value	65,788	11,213
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	27,340	17,740
Accumulated Amortization	(16,186)	(13,376)
Net Book Value	11,154	4,364
Non-compete agreement
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,000	0
Accumulated Amortization	(225)	0
Net Book Value	$ 1,775	$ 0

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
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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
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