Divestitures (Gain on Sale) (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended	12 Months Ended			1 Months Ended
	Sep. 30, 2012	Nov. 30, 2014	Nov. 30, 2013	Nov. 30, 2012	Jul. 31, 2013	Feb. 28, 2013	Dec. 31, 2012	Oct. 31, 2012
Less: net assets sold
Gain on sale		$ 0	$ 71,601	$ 45,105
Gain on sale, net of tax	11,187
Apama [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Purchase price					44,268
Less: transaction costs					2,029
Less: net assets sold
Accounts receivable					2,426
Other current assets					428
Goodwill and intangible assets					6,991
Other long-term assets					426
Deferred revenue					(3,917)
Gain on sale					35,885
Tax provision					13,815
Gain on sale, net of tax			22,070	0	22,070
Artix, Orbacus and Orbix [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Purchase price						15,000
Less: transaction costs						826
Less: indemnification obligation						30
Less: net assets sold
Accounts receivable						2,872
Goodwill and intangible assets						24,325
Other assets						20
Impairment reserve						(8,601)
Deferred revenue						(6,481)
Gain on sale						2,009
Tax provision						0
Gain on sale, net of tax			2,009	0		2,009
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
Less: transaction costs							1,211
Less: net assets sold
Accounts receivable							12,380
Goodwill and intangible assets							31,693
Other assets							976
Deferred revenue							(19,168)
Other liabilities							(299)
Gain on sale							33,707
Tax provision							15,349
Gain on sale, net of tax			18,358	0			18,358
Shadow [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Purchase price								31,903
Less: transaction costs								1,264
Less: net assets sold
Accounts receivable								1,592
Goodwill and intangible assets								10,540
Other assets								103
Deferred revenue								(6,859)
Gain on sale								25,263
Tax provision								12,571
Gain on sale, net of tax			0	12,692				12,692
FuseSource [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Purchase price	21,300
Less: net assets sold
Accounts receivable	2,749
Goodwill and intangible assets	3,690
Other assets	167
Deferred revenue	(5,148)
Gain on sale	19,842
Tax provision	8,655
Gain on sale, net of tax			$ 0	$ 11,187