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Intangible Assets and Goodwill (Schedule Of Intangible Assets) (Details) - USD ($) $ in Thousands | Aug. 31, 2016 | Nov. 30, 2015
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Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 192,622 | $ 200,083
Accumulated Amortization | (104,938) | (85,970)
Net Book Value | 87,684 | 114,113
Purchased technology [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 109,880 | 117,151
Accumulated Amortization | (64,438) | (54,963)
Net Book Value | 45,442 | 62,188
Customer-related [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 67,602 | 67,602
Accumulated Amortization | (33,257) | (25,493)
Net Book Value | 34,345 | 42,109
Trademarks and trade names [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 15,140 | 15,330
Accumulated Amortization | (7,243) | (5,514)
Net Book Value | $ 7,897 | $ 9,816

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