GOODWILL AND ACQUIRED INTANGIBLE ASSETS - Carrying Values of Amortized Acquired Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	May 31, 2014	Nov. 30, 2013
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 463,186	$ 402,613
Accumulated Amortization	(303,560)	(283,195)
Net Carrying Amount	159,626	119,418
Developed technologies
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	234,951	204,918
Accumulated Amortization	(147,912)	(137,758)
Net Carrying Amount	87,039	67,160
Maintenance agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	88,001	87,888
Accumulated Amortization	(63,182)	(58,777)
Net Carrying Amount	24,819	29,111
Customer base
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	95,470	67,707
Accumulated Amortization	(54,855)	(50,623)
Net Carrying Amount	40,615	17,084
Patents/core technologies
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	28,841	28,649
Accumulated Amortization	(27,036)	(26,080)
Net Carrying Amount	1,805	2,569
Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	15,343	12,871
Accumulated Amortization	(9,995)	(9,377)
Net Carrying Amount	5,348	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