Purchased Intangible Assets - Components of Purchased Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 28, 2014	Mar. 30, 2014
Schedule of Acquired Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
In-process research and development, gross carrying value and net carrying value	$ 21,200	$ 21,200
Purchased intangible assets, gross carrying value	102,550	102,550
Purchased intangible assets, accumulated amortization	20,459	7,387
Purchased intangible assets, net carrying value	82,091	95,163
Developed Technology [Member]
Schedule of Acquired Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Purchased finite-lived intangible assets, gross carrying value	72,121	72,121
Purchased intangible assets, accumulated amortization	17,323	4,957
Purchased finite-lived intangible assets, net carrying value	54,798	67,164
Customer Relationships [Member]
Schedule of Acquired Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Purchased finite-lived intangible assets, gross carrying value	5,400	5,400
Purchased intangible assets, accumulated amortization	534
Purchased finite-lived intangible assets, net carrying value	4,866	5,400
Other [Member]
Schedule of Acquired Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Purchased finite-lived intangible assets, gross carrying value	3,829	3,829
Purchased intangible assets, accumulated amortization	2,602	2,430
Purchased finite-lived intangible assets, net carrying value	$ 1,227	$ 1,399