Segment Information (Revenue and Operating Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jan. 03, 2015 segments		Sep. 30, 2014	Dec. 28, 2013
Number of operating and reportable segments	2
Revenue	$ 325,442			$ 324,925
Operating income	37,631	[1]		54,871	[1]
Sales and marketing expenses	(87,607)	[1]		(84,710)	[1]
General and administrative expenses	(37,007)	[1]		(31,279)	[1]
Other income (expense), net	(3,224)			(1,753)
Income before income taxes	34,407			53,118
Restructuring (credit) charge	(255)		26,800	1,067
Segment Software Products
Revenue	246,991			244,253
Operating income	149,045	[1]		158,238	[1]
Restructuring (credit) charge				100
Segment Services
Revenue	78,451			80,672
Operating income	13,200	[1]		12,622	[1]
Restructuring (credit) charge	300			200
Sales and Marketing
Restructuring (credit) charge				500
General and Administrative
Restructuring (credit) charge				300
Restructuring Plan 2013 Q3
Restructuring (credit) charge				$ 1,100

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