Segment Information (Revenue and Operating Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Mar. 30, 2013		Mar. 31, 2012		Mar. 30, 2013 segments		Mar. 31, 2012
Number of operating and reportable segments					2
Revenue	$ 313,949		$ 301,125		$ 633,700		$ 619,401
Operating income	21,244	[1]	6,903	[1]	35,103	[1]	39,408	[1]
Sales and marketing expenses	92,965	[1]	103,443	[1]	193,291	[1]	201,220	[1]
General and administrative expenses	34,171	[1]	31,151	[1]	70,827	[1]	60,723	[1]
Other income (expense), net	(1,867)		(2,967)		(3,672)		(5,610)
Restructuring charges	15,810		20,802		31,212		20,802
Net income	19,377		3,936		31,431		33,798
Software Products Segment
Revenue	236,580		221,653		475,869		458,616
Operating income	141,536	[1]	134,109	[1]	285,127	[1]	286,068	[1]
Restructuring charges	6,100		3,400		11,600
Services Segment
Revenue	77,369		79,472		157,831		160,785
Operating income	6,844	[1]	7,388	[1]	14,094	[1]	15,283	[1]
Restructuring charges	4,000		3,300		6,300
Sales and Marketing
Restructuring charges	4,900		12,500		11,700
General and Administrative
Restructuring charges	800		1,600		1,600
Restructuring Plan 2013 Q2
Restructuring charges	$ 15,810		$ 20,802		$ 31,212

[1] We recorded restructuring charges of $15.8 million and $31.2 million in the second quarter and first six months of 2013, respectively. Software Products included $6.1 million and $11.6 million, respectively; Services included $4.0 million and $6.3 million, respectively; sales and marketing expenses included $4.9 million and $11.7 million, respectively; and general and administrative expenses included $0.8 million and $1.6 million, respectively, of these restructuring charges. We recorded restructuring charges of $20.8 million in the second quarter of 2012. Software Products included $3.4 million; Services included $3.3 million; sales and marketing expenses included $12.5 million; and general and administrative expenses included $1.6 million of these restructuring charges.