Goodwill and Acquisition-Related Intangibles (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
Gross and net amounts of goodwill and of acquisition-related intangibles
Goodwill	$ 159,296	$ 158,990
In-process research and development	0	0
Total acquisition-related intangibles, gross	138,576	135,876
Less accumulated amortization	(109,709)	(99,822)
Total	28,867	36,054
Core Technology [Member]
Gross and net amounts of goodwill and of acquisition-related intangibles
Total acquisition-related intangibles, gross	91,860	89,360
Less accumulated amortization	(63,267)	(54,201)
Total	28,593	35,159
Weighted-Average Amortization Life	5 years 8 months 18 days
Other Intangibles [Member]
Gross and net amounts of goodwill and of acquisition-related intangibles
Total acquisition-related intangibles, gross	46,716	46,516
Less accumulated amortization	(46,442)	(45,621)
Total	$ 274	$ 895
Weighted-Average Amortization Life	2 years 8 months 12 days