GOODWILL AND ACQUIRED INTANGIBLE ASSETS - Carrying Values of Amortized Acquired Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	May 31, 2013	Nov. 30, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 369,169	$ 367,091
Accumulated Amortization	(258,827)	(243,830)
Net Carrying Amount	110,342	123,261
Developed technologies
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	184,496	182,152
Accumulated Amortization	(126,340)	(118,992)
Net Carrying Amount	58,156	63,160
Maintenance agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	83,215	83,762
Accumulated Amortization	(52,790)	(48,481)
Net Carrying Amount	30,425	35,281
Customer base
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	60,569	59,525
Accumulated Amortization	(46,117)	(43,328)
Net Carrying Amount	14,452	16,197
Patents/core technologies
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	27,726	28,295
Accumulated Amortization	(24,393)	(24,198)
Net Carrying Amount	3,333	4,097
Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	12,583	12,777
Accumulated Amortization	(8,607)	(8,251)
Net Carrying Amount	3,976	4,526
Non-compete agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	580	580
Accumulated Amortization	(580)	(580)
Net Carrying Amount	$ 0	$ 0