Goodwill and Purchased Intangible Assets - Components of Purchased Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014
Schedule of Acquired Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Purchased definite-lived intangible assets, gross carrying value	$ 80,850	$ 81,350
In-process research and development, gross carrying value and net carrying value	21,200	21,200
Purchased intangible assets, gross carrying value	102,050	102,550
Purchased definite-lived intangible assets, accumulated amortization	24,391	7,387
Purchased definite-lived intangible assets, net carrying value	56,459	73,963
Purchased intangible assets, net carrying value	77,659	95,163
Developed Technology [Member]
Schedule of Acquired Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Purchased definite-lived intangible assets, gross carrying value	72,121	72,121
Purchased definite-lived intangible assets, accumulated amortization	21,536	4,957
Purchased definite-lived intangible assets, net carrying value	50,585	67,164
Customer Relationships [Member]
Schedule of Acquired Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Purchased definite-lived intangible assets, gross carrying value	5,400	5,400
Purchased definite-lived intangible assets, accumulated amortization	703
Purchased definite-lived intangible assets, net carrying value	4,697	5,400
Other [Member]
Schedule of Acquired Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Purchased definite-lived intangible assets, gross carrying value	3,329	3,829
Purchased definite-lived intangible assets, accumulated amortization	2,152	2,430
Purchased definite-lived intangible assets, net carrying value	$ 1,177	$ 1,399