GOODWILL AND ACQUIRED INTANGIBLE ASSETS - Carrying Values of Amortized Acquired Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	Feb. 28, 2014	Nov. 30, 2013
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 406,299	$ 402,613
Accumulated Amortization	(296,271)	(283,195)
Net Carrying Amount	110,028	119,418
Developed technologies
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	206,931	204,918
Accumulated Amortization	(144,155)	(137,758)
Net Carrying Amount	62,776	67,160
Maintenance agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	88,434	87,888
Accumulated Amortization	(61,700)	(58,777)
Net Carrying Amount	26,734	29,111
Customer base
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	68,308	67,707
Accumulated Amortization	(53,220)	(50,623)
Net Carrying Amount	15,088	17,084
Patents/core technologies
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	29,057	28,649
Accumulated Amortization	(26,870)	(26,080)
Net Carrying Amount	2,187	2,569
Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	12,989	12,871
Accumulated Amortization	(9,746)	(9,377)
Net Carrying Amount	3,243	3,494
Non-compete agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	580	580
Accumulated Amortization	(580)	(580)
Net Carrying Amount	$ 0	$ 0