Divestitures (Narrative) (Details) (USD $)	3 Months Ended	12 Months Ended
	Feb. 28, 2013	Nov. 30, 2012
Artix, Orbacus and Orbix [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Carrying value of indemnification obligation	$ 1,000,000
Indemnification obligation, maximum potential exposure	11,300,000
Total consideration	15,000,000
Impairment loss on assets held for sale		8,601,000
Actional, DataXtend, ObjectStore, Savvion, and Sonic [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total consideration	$ 60,500,000