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Intangible Assets and Goodwill (Schedule Of Intangible Assets) (Details) - USD ($) $ in Thousands | Aug. 31, 2019 | Nov. 30, 2018
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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

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