Divestitures (Narrative) (Details) (USD $)	12 Months Ended			1 Months Ended		3 Months Ended	1 Months Ended
	Nov. 30, 2014	Nov. 30, 2013	Nov. 30, 2012	Jul. 31, 2013	Feb. 28, 2013	Nov. 30, 2012	Dec. 31, 2012	Oct. 31, 2012	Sep. 30, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment loss	$ 0	$ 0	$ 8,601,000
Apama [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Purchase price				44,268,000
Consideration held in escrow				4,500,000
Period to be held in Escrow				18 months
Distributor license agreement term	3 years
Reduction of total sales price				700,000
Artix, Orbacus and Orbix [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Purchase price					15,000,000
Impairment loss						8,600,000
Indemnification obligation, maximum potential exposure					1,000,000
Indemnification obligation, maximum potential exposure		30,000
Actional, DataXtend, ObjectStore, Savvion, and Sonic [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Purchase price							60,500,000
Shadow [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Purchase price								31,903,000
Consideration held in escrow								3,300,000
Total consideration								33,000,000
Months held In escrow								15 months
Reduction of total sales price								1,100,000
Distributor license agreement term								3 years
FuseSource [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Purchase price									21,300,000
Consideration held in escrow									$ 2,100,000
Months held In escrow									15 months