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Divestitures (Narrative) (Details) (USD $) | 1 Months Ended | 9 Months Ended | 12 Months Ended | 9 Months Ended
--- | --- | --- | --- | ---
Jul. 31, 2013 Apama [Member] | Aug. 31, 2013 Apama [Member] | Aug. 31, 2013 Artix, Orbacus and Orbix [Member] | Nov. 30, 2012 Artix, Orbacus and Orbix [Member] | Aug. 31, 2013 Actional, DataXtend, ObjectStore, Savvion, and Sonic [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Total consideration | $ 44,268,000 | $ 44,268,000 | $ 15,000,000 |  | $ 60,500,000
Disposal Group, Including Discontinued Operations, Consideration Held in Escrow | 4,500,000 |  |  |  |
Carrying value of indemnification obligation |  |  | 1,000,000 |  |
Period to be held in escrow to secure indemnification claims | 18 months |  |  |  |
Period of distributor license agreement |  | 3 years |  |  |
Reduction of purchase price | 700,000 |  |  |  |
Indemnification obligation, maximum potential exposure |  |  | 11,300,000 |  |
Impairment loss on assets held for sale |  |  |  | $ 8,601,000 |

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