Basis of Presentation (Details Textual) (USD $)	3 Months Ended
	Jun. 29, 2012 Y	Jul. 01, 2011	Mar. 30, 2012
Property Plant And Equipment [Line Items]
Total accumulated depreciation of CPE	$ 223,950,000		$ 209,044,000
Equity Class Of Treasury Stock [Line Items]
Purchase of treasury shares pursuant to vesting of certain RSU agreements	(2,020,000)
The Company and a Summary of Its Significant Accounting Policies (Textual) [Abstract]
Forward loss related to loss contracts	1,300,000	300,000
Advertising Expense	5,500,000	800,000
Total US government contract-related reserves balance	6,700,000		6,700,000
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.
Property, equipment and satellites, estimated useful life minimum (years)	2
Property, equipment and satellites, estimated useful life maximum (years)	24
Capitalized interest expense	800,000	7,600,000
CPE leased equipment, total cost	101,262,000		85,271,000
Capital Leases	3,100,000		3,100,000
Capital lease accumulated amortization	1,000,000		800,000
Total capitalized cost 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	400,000		400,000
Payment of debt issuance costs	(2,215,000)	0
Life over which software development costs are amortized once product is available for general release	5
Capitalized costs, net, related to software developed for resale	46,900,000		42,000,000
Capitalized cost related to software development for resale	6,400,000	5,200,000
Amortization expense of software development costs	1,500,000	1,200,000
Self-insurance liability	1,900,000		1,700,000
Accrued indemnification losses	0		0
Stock-based compensation expense	6,619,000	4,175,000
Foreign currency forward contracts maturity	9 to 20 months
Incremental tax benefit from stock options exercised and restricted stock unit awards vesting	0	0
Notional value of foreign currency forward contracts outstanding	10,200,000		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	600,000
Gains or losses from ineffectiveness of derivative instruments	0	0
Less accumulated depreciation and amortization	(223,950,000)		(209,044,000)
Amortization expense related to patents and other licenses	0	0
Impairment of long-lived assets (property, equipment, and satellites, and other assets) recorded	0	0
Common Stock Held in Treasury [Member]
Equity Class Of Treasury Stock [Line Items]
Purchase of treasury shares pursuant to vesting of certain RSU agreements, shares	47,665	48,918
Purchase of treasury shares pursuant to vesting of certain RSU agreements	(2,020,000)	(2,200,000)
Repurchased shares of common stock held in treasury	775,339		727,674
Common Stock [Member]
Equity Class Of Treasury Stock [Line Items]
Common stock issued based on the vesting terms of certain restricted stock unit agreements	127,604	129,470
Repurchased shares of common stock held in treasury	(44,289,591)		(43,776,202)
Customer Premise Equipment [Member]
Property Plant And Equipment [Line Items]
Total accumulated depreciation of CPE	35,600,000		33,100,000
The Company and a Summary of Its Significant Accounting Policies (Textual) [Abstract]
Property, equipment and satellites, estimated useful life minimum (years)	3
Property, equipment and satellites, estimated useful life maximum (years)	5
Less accumulated depreciation and amortization	$ (35,600,000)		$ (33,100,000)
Accounting Standards Update No 2011-05 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
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. In December 2011, the FASB further amended its guidance to defer changes related to the presentation of reclassification adjustments indefinitely as a result of concerns raised by stakeholders that the new presentation requirements would be difficult for preparers and add unnecessary complexity to financial statements. The authoritative guidance (other than the portion regarding the presentation of reclassification adjustments which, as noted above, has been deferred indefinitely) 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, and the components of net income and other comprehensive income in two separate, but consecutive statements. The adoption of this standard only changed how the Company presents comprehensive income and did not impact the Company’s consolidated financial position, results of operations or cash flows.
Accounting Standards Update No 2011-08 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Description of new accounting pronouncements	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.
Accounting Standards Update No 2011-11 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Description of new accounting pronouncements	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.