The Company and a Summary of Its Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended					12 Months Ended							12 Months Ended								3 Months Ended	12 Months Ended
	Mar. 29, 2013 Y	Mar. 30, 2012	Apr. 01, 2011	Mar. 29, 2013 Customer Premise Equipment [Member]	Mar. 30, 2012 Customer Premise Equipment [Member]	Mar. 29, 2013 Common stock [Member]	Mar. 30, 2012 Common stock [Member]	Apr. 01, 2011 Common stock [Member]	Mar. 29, 2013 Common stock held in treasury [Member]	Mar. 30, 2012 Common stock held in treasury [Member]	Apr. 01, 2011 Common stock held in treasury [Member]	Apr. 02, 2010 Common stock held in treasury [Member]	Mar. 29, 2013 Percentage of total billed receivables from the U.S. government [Member]	Mar. 30, 2012 Percentage of total billed receivables from the U.S. government [Member]	Mar. 29, 2013 Percentage of total revenues from the U.S. government [Member]	Mar. 30, 2012 Percentage of total revenues from the U.S. government [Member]	Apr. 01, 2011 Percentage of total revenues from the U.S. government [Member]	Mar. 29, 2013 Percentage of total revenues from the Company's five largest contracts [Member]	Mar. 30, 2012 Percentage of total revenues from the Company's five largest contracts [Member]	Apr. 01, 2011 Percentage of total revenues from the Company's five largest contracts [Member]	Jul. 01, 2011 Government satellite communication program [Member]	Apr. 01, 2011 Government satellite communication program [Member]	Mar. 29, 2013 Accounting Standards Update No 2011-05 [Member]	Mar. 29, 2013 Accounting Standards Update No 2011-08 [Member]	Mar. 29, 2013 Accounting Standards Update No 2011-11 [Member]	Mar. 29, 2013 Accounting Standards Update 2012-02 [Member]	Mar. 29, 2013 Accounting Standards Update 2013-02 [Member]	Mar. 29, 2013 Accounting Standards Update 2013-05 [Member]	Mar. 29, 2013 Minimum [Member]	Mar. 29, 2013 Minimum [Member] Customer Premise Equipment [Member]	Mar. 29, 2013 Maximum [Member]	Mar. 29, 2013 Maximum [Member] Customer Premise Equipment [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage													37.90%	21.40%	24.10%	19.90%	24.50%	24.00%	19.60%	21.20%
Revenues from the Company's commercial customers which are 10% or more of total revenues	0.00%	0.00%	0.00%
Property, equipment and satellites, estimated useful life (years)																													2 years	3 years	24 years	5 years
Capitalized interest expense	$ 3,100,000	$ 25,900,000	$ 28,300,000
CPE leased equipment, total cost	170,900,000	85,300,000
Accumulated depreciation and amortization	282,790,000	209,044,000		51,500,000	33,100,000
Total capitalized costs related to patents	3,200,000	3,200,000
Total capitalized costs related to orbital slots and other licenses	8,600,000	8,400,000
Accumulated amortization of patents and other licenses	700,000	400,000
Amortization expense related to patents and other licenses	0	0	0
Impairment of long-lived assets (property, equipment, and satellites, and other assets) recorded	0	0	0
Payment of debt issuance costs	8,059,000	5,706,000	2,775,000
Capitalized costs, net, related to software developed for resale	60,596,000	41,992,000
Life over which software development costs are amortized once product is available for general release	5
Capitalized cost related to software development for resale	25,800,000	22,700,000
Amortization expense of software development costs	7,200,000	5,200,000
Impairment of goodwill recorded by the Company	0	0	0
Maximum warranty periods provided on limited warranty	5 years
Self-insurance liability	2,300,000	1,700,000
Common stock issued based on the vesting terms of certain restricted stock unit agreements						612,233	472,311	433,173
Purchase of treasury shares pursuant to vesting of certain RSU agreements, shares									219,933	167,311	153,226
Purchase of treasury shares pursuant to vesting of certain RSU agreements	8,412,000	7,451,000	5,880,000						8,412,000	7,451,000	5,880,000
Repurchased shares of common stock held in treasury						(44,974,186)	(43,048,528)		947,607	727,674	560,363	407,137
Notional value of foreign currency forward contracts outstanding	7,000,000	9,600,000
Estimated net amount of unrealized gains or losses on foreign currency cash flow income expected to be reclassified to earnings within the next twelve months	300,000
Gains or losses from ineffectiveness of derivative instruments	0	0	0
Foreign currency forward contracts maturity	Two to twenty-three months
Forward loss related to loss contracts	3,100,000	1,400,000	12,100,000																		8,500,000	8,500,000
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 completed for fiscal year 2004 and subsequent fiscal years. Although the Company has recorded contract revenues subsequent to fiscal year 2003 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.
Total U.S. government contract-related reserves balance	7,200,000	6,700,000
Advertising expenses	21,800,000	2,800,000	2,200,000
Deferred rent included in accrued liabilities	800,000	700,000
Deferred rent included in other long-term liabilities	$ 8,964,000	$ 8,237,000
Description of new accounting pronouncements																							In June 2011, the FASB issued ASU 2011-05, Comprehensive Income (ASC 220): Presentation of Comprehensive Income. The new authoritative guidance requires an entity to present the total of comprehensive income, the components of net income, and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements. The new authoritative guidance eliminates the option to present the components of other comprehensive income as part of the statement of equity. The authoritative guidance became effective for the Company beginning in the first quarter of fiscal year 2013. In the first quarter of fiscal year 2013, the Company retrospectively adopted the new accounting standard for the presentation of comprehensive income in financial statements which resulted in the presentation of a total for comprehensive income (loss), and the components of net income (loss) and other comprehensive income (loss) in one statement. The adoption of this standard only changed how the Company presents comprehensive income (loss) and did not impact the Company’s consolidated financial position, results of operations or cash flows.	In September 2011, the FASB issued ASU 2011-08, Intangibles—Goodwill and Other (ASC 350): Testing Goodwill for Impairment. The new authoritative guidance simplifies how an entity tests goodwill for impairment. The new authoritative guidance allows an entity to first assess qualitative factors to determine whether it is necessary to perform the two-step quantitative goodwill impairment test. The two-step quantitative impairment test is required only if, based on its qualitative assessment, an entity determines that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. This authoritative guidance is effective for interim and annual goodwill impairment tests performed for fiscal years beginning after December 15, 2011. Early adoption is permitted if an entity’s financial statements for the more recent interim and annual period have not yet been issued. The Company early adopted this authoritative guidance in the fourth quarter of fiscal year 2012. Adoption of this authoritative guidance did not have a material impact on the Company’s consolidated financial statements and disclosures.	In December 2011, the FASB issued ASU 2011-11, Balance Sheet (ASC 210): Disclosures about offsetting Assets and Liabilities. The new authoritative guidance requires an entity to disclose information about offsetting and related arrangements to enable users of its financial statements to evaluate the effect or potential effect of netting arrangements on an entity’s financial position, including the effect or potential effect of rights of setoff associated with certain financial instruments and derivative instruments in the scope of this authoritative guidance. This authoritative guidance will be effective for the Company beginning in the first quarter of fiscal year 2014 and should be applied retrospectively for all comparative periods presented. The Company is currently evaluating the impact that this authoritative guidance may have on its consolidated financial statements and disclosures.	In July 2012, the FASB issued ASU 2012-02, Intangibles—Goodwill and Other (ASC 350): Testing Indefinite-Lived Intangible Assets for Impairment. The new authoritative guidance simplifies the requirements for testing for indefinite-lived intangible assets other than goodwill and permits an entity to first assess qualitative factors to determine whether it is necessary to perform a quantitative fair value test. The guidance is effective for the Company for annual and, if any, interim impairment tests in fiscal year 2014 with early adoption permitted. The Company anticipates that the adoption of this standard will not have a material impact on its consolidated financial statements and disclosures.	In February 2013, the FASB issued ASU 2013-02, Comprehensive Income (ASC 220): Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income. ASU 2013-02 requires an entity to provide information about the amounts reclassified out of accumulated other comprehensive income by component. In addition, an entity is required to present, either on the face of the statement where net income is presented or in the notes, significant amounts reclassified out of accumulated other comprehensive income by the respective line items of net income. The guidance, effective for the Company beginning in the first quarter of fiscal year 2014, requires changes in presentation only and the Company anticipates that the adoption of this standard will not have a significant impact on its consolidated financial statements and dis	In March 2013, the FASB issued ASU 2013-05, Foreign Currency Matters (ASC 830): Parent’s Accounting for the Cumulative Translation Adjustment upon Derecognition of Certain Subsidiaries or Groups of Assets within a Foreign Entity or of an Investment in a Foreign Entity. ASU 2013-05 clarifies that the cumulative translation adjustment should be released into net income only when a reporting entity ceases to have a controlling financial interest in a subsidiary or a business within a foreign entity. Further, for an equity method investment that is a foreign entity, a pro rata portion of the cumulative translation adjustment should be released into net income upon a partial sale of such an equity method investment. The guidance, effective for the Company beginning in the first quarter of fiscal year 2015, is not expected to have a material impact on its consolidated financial statements and disclosures.