GOODWILL AND ACQUIRED INTANGIBLE ASSETS - Carrying Values of Amortized Acquired Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2014	Nov. 30, 2013
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 458,652	$ 402,613
Accumulated Amortization	(309,755)	(283,195)
Net Carrying Amount	148,897	119,418
Developed technologies
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	225,100	204,918
Accumulated Amortization	(151,507)	(137,758)
Net Carrying Amount	73,593	67,160
Maintenance agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	87,343	87,888
Accumulated Amortization	(63,975)	(58,777)
Net Carrying Amount	23,368	29,111
Customer base
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	101,012	67,707
Accumulated Amortization	(56,375)	(50,623)
Net Carrying Amount	44,637	17,084
Patents/core technologies
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	28,469	28,649
Accumulated Amortization	(27,033)	(26,080)
Net Carrying Amount	1,436	2,569
Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	16,148	12,871
Accumulated Amortization	(10,285)	(9,377)
Net Carrying Amount	5,863	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