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Divestitures (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Aug. 31, 2013
Feb. 28, 2013
Aug. 31, 2013
Nov. 30, 2013
Apama [Member]        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Purchase price $ 44,268      
Consideration held in escrow $ 4,500   $ 4,500  
Period to be held in Escrow 18 months      
Distributor license agreement term     3 years  
Reduction of total sales price     $ 700  
Artix, Orbacus and Orbix [Member]        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Purchase price   $ 15,000    
Indemnification obligation, maximum potential exposure   1,000    
Indemnification obligation, maximum potential exposure       $ 30
Actional, DataXtend, ObjectStore, Savvion, and Sonic [Member]        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Purchase price   $ 60,500