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Contingencies - Additional Information (Detail) (USD $)	0 Months Ended	12 Months Ended
Contingencies - Additional Information (Detail) (USD $)	Sep. 05, 2014	Apr. 03, 2015	Apr. 04, 2014	Mar. 29, 2013
Gain Contingencies [Line Items]
Litigation settlement amount	$ 108,712,000us-gaap_LitigationSettlementAmount
Proceeds from legal settlement		53,700,000us-gaap_ProceedsFromLegalSettlements
Product revenues		728,074,000us-gaap_SalesRevenueGoodsNet	785,738,000us-gaap_SalesRevenueGoodsNet	664,417,000us-gaap_SalesRevenueGoodsNet
Selling, general and administrative expenses		270,841,000	281,533,000	240,859,000
Interest income		2,000,000us-gaap_LitigationSettlementInterest
Implied license [Member]
Gain Contingencies [Line Items]
Litigation settlement amount	85,132,000
Other damages [Member]
Gain Contingencies [Line Items]
Litigation settlement amount	18,714,000
Satellite Services [Member] \| Operating Segments [Member]
Gain Contingencies [Line Items]
Product revenues		33,576,000	42,000	4,715,000
Satellite Services [Member] \| Implied license [Member] \| Operating Segments [Member]
Gain Contingencies [Line Items]
Product revenues		33,000,000
Satellite Services [Member] \| Other damages [Member]
Gain Contingencies [Line Items]
Selling, general and administrative expenses		18,700,000
Unfavorable Regulatory Action [Member]
Gain Contingencies [Line Items]
Total U.S. government contract-related reserves balance		$ 4,300,000	$ 6,700,000