Goodwill and Acquisition-Related Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 02, 2016	Mar. 28, 2015
Gross and net amounts of goodwill and of acquisition-related intangibles
Goodwill	$ 159,296	$ 159,296	[1]
Total acquisition-related intangibles, gross	124,246	124,246
Less accumulated amortization	(116,800)	(111,494)
Total	7,446	12,752
Core Technology [Member]
Gross and net amounts of goodwill and of acquisition-related intangibles
Total acquisition-related intangibles, gross	77,640	77,640
Less accumulated amortization	(70,244)	(64,988)
Total	$ 7,396	12,652
Weighted-Average Amortization Life	5 years 7 months 18 days
Other Intangibles [Member]
Gross and net amounts of goodwill and of acquisition-related intangibles
Total acquisition-related intangibles, gross	$ 46,606	46,606
Less accumulated amortization	(46,556)	(46,506)
Total	$ 50	$ 100
Weighted-Average Amortization Life	2 years 8 months 12 days

[1] Derived from audited financial statements