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Intangible Assets and Goodwill (Schedule Of Intangible Assets) (Details) - USD ($) $ in Thousands | May. 31, 2015 | Nov. 30, 2014
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Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 201,095 | $ 78,473
Accumulated Amortization | (72,490) | (57,895)
Net Book Value | 128,605 | 20,578
Purchased technology [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 118,148 | 53,789
Accumulated Amortization | (47,842) | (39,575)
Net Book Value | 70,306 | 14,214
Customer-related and other [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 67,617 | 20,554
Accumulated Amortization | (20,329) | (15,195)
Net Book Value | 47,288 | 5,359
Trademarks and trade names [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 15,330 | 4,130
Accumulated Amortization | (4,319) | (3,125)
Net Book Value | $ 11,011 | $ 1,005

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