Segment Information (Revenue and Operating Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended					6 Months Ended				3 Months Ended
	Apr. 04, 2015		Sep. 30, 2014	Mar. 29, 2014		Apr. 04, 2015 segments		Mar. 29, 2014		Jan. 03, 2015
Number of operating and reportable segments						2
Revenue	$ 314,119			$ 328,700		$ 639,561		$ 653,625
Operating income	3,988	[1]		51,213	[1]	41,619	[1]	106,084	[1]
Sales and marketing expenses	(94,942)	[1]		(85,933)	[1]	(182,549)	[1]	(170,644)	[1]
General and administrative expenses	(38,828)	[1]		(34,140)	[1]	(75,835)	[1]	(65,419)	[1]
Other income (expense), net	(3,601)			(2,692)		(6,825)		(4,446)
Income before income taxes	387			48,521		34,794		101,638
Restructuring charges	38,487		26,800	0		38,232		1,067
Segment Software Products
Revenue	240,951			245,423		487,942		489,677
Operating income	134,580	[1]		154,859	[1]	283,625	[1]	313,099	[1]
Restructuring charges	10,000							100
Segment Services
Revenue	73,168			83,277		151,619		163,948
Operating income	3,178	[1]		16,427	[1]	16,378	[1]	29,048	[1]
Restructuring charges	11,000							200		300
Sales and Marketing
Restructuring charges	12,900							500
General and Administrative
Restructuring charges	4,600							300
Restructuring Plan 2013 Q3
Restructuring charges								$ 1,100

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