Goodwill And Acquired Intangible Assets (Tables)

3 Months Ended

Feb. 28, 2012

Goodwill And Acquired Intangible Assets [Abstract]

Change In Carrying Value Of Goodwill

Balance as of November 30, 2011	$	451,821
Foreign currency translation		3,221
Balance as of February 28, 2012	$	455,042

Carrying Values Of Intangible Assets

	February 28, 2012							November 30, 2011
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Developed technologies	$	147,224	$	(105,980	)	$	41,244	$	146,289	$	(102,034	)	$	44,255
Customer base		56,507		(39,030	)		17,477		56,165		(37,376	)		18,789
Patents/core technologies		28,156		(22,531	)		5,625		27,922		(21,542	)		6,380
Trademarks		9,835		(7,385	)		2,450		9,771		(7,077	)		2,694
Non-compete agreements		580		(580	)		—		580		(580	)		—
Maintenance agreements		62,066		(40,835	)		21,231		61,677		(38,237	)		23,440
Total intangible assets subject to amortization		304,368		(216,341	)		88,027		302,404		(206,846	)		95,558
In-process research and development		1,700		—			1,700		1,700		—			1,700
Total intangible assets	$	306,068	$	(216,341	)	$	89,727	$	304,104	$	(206,846	)	$	97,258