The Company and a Summary of Its Significant Accounting Policies - Additional Information (Detail) - USD ($)	12 Months Ended
	Mar. 31, 2016	Apr. 03, 2015	Apr. 04, 2014	Jun. 30, 2015
Company And Summary Of Significant Accounting Policies [Line Items]
Capitalized interest expense	$ 30,100,000	$ 16,200,000	$ 8,100,000
Total capitalized costs related to patents	3,200,000	3,200,000
Total capitalized costs related to orbital slots and other licenses	15,400,000	15,100,000
Accumulated amortization of patents and other licenses	1,700,000	1,400,000
Capitalized debt issuance costs		3,500,000	2,500,000
Goodwill and other intangible assets impairment	$ 0	0	0
Maximum warranty periods provided on limited warranty	5 years
Forward loss related to loss contracts	$ 5,100,000	600,000	3,300,000
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. As of March 31, 2016, the DCAA had completed its incurred cost audit for fiscal year 2004 and approved the Company’s incurred cost claims for fiscal years 2005 through 2015 without further audit. Although the Company has recorded contract revenues subsequent to fiscal year 2015 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	$ 12,200,000	17,000,000	$ 18,900,000
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 and Equipment, Net [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Property and equipment	$ 1,050,886,000	878,550,000
Accumulated depreciation and amortization	$ 563,976,000	460,528,000
CPE leased equipment [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] | Maximum [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Property, equipment and satellites, estimated useful life (years)	5 years
CPE leased equipment [Member] | Property and Equipment, Net [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Property and equipment	$ 260,409,000	250,281,000
Accumulated depreciation and amortization	$ 136,400,000	$ 107,800,000
Engreen [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Purchase price of the acquisition				$ 5,300,000
Purchase price of the acquisition that has been withheld				$ 500,000
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	23.70%	22.80%	21.20%
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	22.80%	30.60%
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	19.40%	21.10%	26.40%
Unfavorable Regulatory Action [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Total U.S. government contract-related reserves balance	$ 2,500,000	$ 4,300,000