Segment Information (Revenue and Operating Income) (Details) $ in Thousands		3 Months Ended			6 Months Ended
		Apr. 02, 2016 USD ($)	Apr. 04, 2015 USD ($)	Jan. 03, 2015 USD ($)	Apr. 02, 2016 USD ($) segments	Apr. 04, 2015 USD ($)
Number of operating and reportable segments | segments					2
Revenue		$ 272,627	$ 314,119		$ 563,644	$ 639,561
Operating income	[1]	1,758	3,988		(11,535)	41,619
Sales and marketing expenses	[1]	(87,850)	(94,942)		(186,180)	(182,549)
General and administrative expenses	[1]	(33,878)	(38,828)		(75,806)	(75,835)
Interest and other expense, net		(5,327)	(3,601)		(11,580)	(6,825)
Income before income taxes		(3,569)	387		(23,115)	34,794
Restructuring charges		4,579	38,487		41,726	38,232
Segment Software Products
Revenue		210,061	240,951		435,598	487,942
Operating income	[1]	109,165	134,580		216,811	283,625
Restructuring charges		3,700	10,000		16,800
Segment Services
Revenue		62,566	73,168		128,046	151,619
Operating income	[1]	14,321	3,178		33,640	$ 16,378
Restructuring charges		200	11,000	$ (300)	5,000
Sales and Marketing
Restructuring charges		700	12,900		16,600
General and Administrative
Restructuring charges		$ 0	$ 4,600		$ 3,300

[1] We recorded restructuring charges of $4.6 million and $41.7 million in the second quarter and first six months of 2016. Software Products included $3.7 million and $16.8 million, respectively; Services included $0.2 million and $5.0 million, respectively; sales and marketing expenses included $0.7 million and $16.6 million, respectively; and general and administrative expenses included $0.0 million and $3.3 million, respectively, of these restructuring charges. We recorded restructuring charges of $38.5 million in the second quarter of 2015. Software Products included $10.0 million; Services included $11.0 million; sales and marketing expenses included $12.9 million; and general and administrative expenses included $4.6 million of these restructuring charges. We recorded a credit to restructuring of $0.3 million in the first quarter of 2015 which is included in the Services segment.