GOODWILL AND ACQUIRED INTANGIBLE ASSETS - Carrying Values of Amortized Acquired Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2013	Nov. 30, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 389,758	$ 367,091
Accumulated Amortization	(269,259)	(243,830)
Net Carrying Amount	120,499	123,261
Developed technologies
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	197,105	182,152
Accumulated Amortization	(131,090)	(118,992)
Net Carrying Amount	66,015	63,160
Maintenance agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	87,075	83,762
Accumulated Amortization	(55,675)	(48,481)
Net Carrying Amount	31,400	35,281
Customer base
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	64,435	59,525
Accumulated Amortization	(48,028)	(43,328)
Net Carrying Amount	16,407	16,197
Patents/core technologies
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	27,917	28,295
Accumulated Amortization	(24,966)	(24,198)
Net Carrying Amount	2,951	4,097
Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	12,646	12,777
Accumulated Amortization	(8,920)	(8,251)
Net Carrying Amount	3,726	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