The Company and a Summary of Its Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Apr. 03, 2015	Apr. 04, 2014	Mar. 29, 2013
Company And Summary Of Significant Accounting Policies [Line Items]
Fiscal period	364 days	371 days	364 days
Capitalized interest expense	$ 16,200,000	$ 8,100,000	$ 3,100,000
Total capitalized costs related to patents	3,200,000	3,200,000
Total capitalized costs related to orbital slots and other licenses	15,100,000	13,500,000
Accumulated amortization of patents and other licenses	1,400,000	1,000,000
Write off costs due to abandonment or impairment	0	0	0
Capitalized debt issuance costs	3,500,000	2,500,000	8,100,000
Goodwill and other intangible assets impairment	0	0	0
Maximum warranty periods provided on limited warranty	5 years
Forward loss related to loss contracts	600,000	3,300,000	3,100,000
Defense contract audit agency completed cost audits	Contract costs on U.S. government contracts are subject to audit and review by the Defense Contracting Management Agency (DCMA), the Defense Contract Audit Agency (DCAA), and other U.S. government agencies, as well as negotiations with U.S. government representatives. The Company’s incurred cost audits by the DCAA have not been concluded for fiscal year 2011 and subsequent fiscal years. During the second quarter of fiscal year 2015, the DCAA completed its incurred cost audit for fiscal year 2004 and approved the Company’s incurred cost claims for fiscal years 2005 through 2010 without further audit. Although the Company has recorded contract revenues subsequent to fiscal year 2010 based upon an estimate of costs that the Company believes will be approved upon final audit or review, the Company does not know the outcome of any ongoing or future audits or reviews and adjustments, and if future adjustments exceed the Company’s estimates, its profitability would be adversely affected.
Advertising expenses	17,000,000	18,900,000	21,800,000
Minimum [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Property, equipment and satellites, estimated useful life (years)	2 years
Maximum [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Property, equipment and satellites, estimated useful life (years)	24 years
Property Plant and Equipment - Excluding Satellites [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Property and equipment	878,550,000	781,752,000
Accumulated depreciation and amortization	460,528,000	360,086,000
CPE leased equipment [Member] | Property Plant and Equipment - Excluding Satellites [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Property and equipment	250,281,000	221,017,000
Accumulated depreciation and amortization	107,800,000	79,800,000
CPE leased equipment [Member] | Property Plant and Equipment - Excluding Satellites [Member] | Minimum [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Property, equipment and satellites, estimated useful life (years)	4 years
CPE leased equipment [Member] | Property Plant and Equipment - Excluding Satellites [Member] | Maximum [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Property, equipment and satellites, estimated useful life (years)	5 years
Percentage of total revenues from the U.S. government [Member] | Sales revenue, net [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage	22.80%	21.20%	24.10%
Percentage of total revenues from the U.S. government [Member] | Percentage of total billed receivables from the U.S. government [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage	30.60%	22.30%
Percentage of total revenues from the Company's five largest contracts [Member] | Sales revenue, net [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage	21.10%	26.40%	24.00%
Technology [Member] | Lono Cloud [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Purchase price allocated to acquired intangible assets	2,400,000
Unfavorable Regulatory Action [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Total U.S. government contract-related reserves balance	$ 4,300,000	$ 6,700,000