Acquisition (Unaudited Pro Forma Financial Information) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Jun. 28, 2014		Jun. 29, 2013		Jun. 28, 2014		Jun. 29, 2013
Pro Forma
Revenue			$ 315,500				$ 951,400
Operating income			43,100				84,000
Net income			34,300				60,300
Earnings per share—Basic (in USD per share)			$ 0.29				$ 0.50
Earnings per share—Diluted (in USD per share)			$ 0.28				$ 0.50
As Reported
Revenue	336,634		314,996		990,259		948,696
Operating income	54,384	[1]	43,215	[1]	160,468	[1]	78,318	[1]
Net income	$ 38,026		$ 34,455		$ 121,439		$ 87,303
Earnings per share—Basic (in USD per share)	$ 0.32		$ 0.29		$ 1.02		$ 0.73
Earnings per share—Diluted (in USD per share)	$ 0.32		$ 0.29		$ 1.01		$ 0.72

[1] We recorded restructuring charges of $1.6 million in the first nine months of 2014. Software Products included $0.1 million; Services included $0.2 million; sales and marketing expenses included $0.5 million; and general and administrative expenses included $0.8 million of these restructuring charges. We recorded restructuring charges of $3.1 million and $34.3 million in the third quarter and first nine months of 2013, respectively. Software Products included $1.0 million and $12.6 million, respectively; Services included $0.3 million and $6.6 million, respectively; sales and marketing expenses included $1.1 million and $12.8 million, respectively; and general and administrative expenses included $0.7 million and $2.3 million, respectively, of these restructuring charges.