Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Apr. 04, 2015		Mar. 29, 2014		Apr. 04, 2015		Mar. 29, 2014
Revenue:
License and subscription solutions	$ 85,952		$ 88,545		$ 164,923		$ 171,411
Support	168,727		166,249		350,356		336,391
Professional services	59,440		73,906		124,282		145,823
Total revenue	314,119		328,700		639,561		653,625
Cost of revenue:
Cost of license and subscription solutions revenue	13,190		10,889		26,519		21,208
Cost of support revenue	21,328		21,564		42,724		41,480
Cost of professional services revenue	51,536		61,344		109,753		124,065
Total cost of revenue	86,054		93,797		178,996		186,753
Gross margin	228,065		234,903		460,565		466,872
Operating expenses:
Sales and marketing	82,024		85,934		169,631		170,172
Research and development	60,158		55,631		121,255		108,704
General and administrative	34,235		34,140		71,242		65,071
Amortization of acquired intangible assets	9,173		7,985		18,586		15,774
Restructuring charges	38,487		0		38,232		1,067
Total operating expenses	224,077		183,690		418,946		360,788
Operating income	3,988	[1]	51,213	[1]	41,619	[1]	106,084	[1]
Interest and other income (expense), net	(3,601)		(2,692)		(6,825)		(4,446)
Income before income taxes	387		48,521		34,794		101,638
(Benefit) Provision for income taxes	(5,005)		4,765		(882)		18,225
Net income	$ 5,392		$ 43,756		$ 35,676		$ 83,413
Earnings per share—Basic (in USD per share)	$ 0.05		$ 0.37		$ 0.31		$ 0.70
Earnings per share—Diluted (in USD per share)	$ 0.05		$ 0.36		$ 0.31		$ 0.69
Weighted average shares outstanding—Basic (in shares)	114,944		118,978		115,147		118,973
Weighted average shares outstanding—Diluted (in shares)	115,922		120,698		116,479		120,916

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