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Goodwill and Acquired Intangible Assets - Additional Information (Detail) (USD $)
12 Months Ended
Apr. 03, 2015
Apr. 04, 2014
Mar. 29, 2013
Finite-Lived Intangible Assets [Line Items]      
Change in goodwill $ 33,600,000us-gaap_GoodwillPeriodIncreaseDecrease    
Increase in goodwill related to foreign currency translation   600,000us-gaap_GoodwillTranslationAdjustments  
Amortization of acquired intangible assets 17,966,000vsat_AmortizationOfAcquiredIntangibleAsset 14,614,000vsat_AmortizationOfAcquiredIntangibleAsset 15,584,000vsat_AmortizationOfAcquiredIntangibleAsset
Government Systems [Member]      
Finite-Lived Intangible Assets [Line Items]      
Amortization of acquired intangible assets 5,456,000vsat_AmortizationOfAcquiredIntangibleAsset
/ us-gaap_StatementBusinessSegmentsAxis
= vsat_GovernmentSystemsMember
2,219,000vsat_AmortizationOfAcquiredIntangibleAsset
/ us-gaap_StatementBusinessSegmentsAxis
= vsat_GovernmentSystemsMember
2,517,000vsat_AmortizationOfAcquiredIntangibleAsset
/ us-gaap_StatementBusinessSegmentsAxis
= vsat_GovernmentSystemsMember
Minimum [Member]      
Finite-Lived Intangible Assets [Line Items]      
Other acquired intangible assets estimated useful lives 2 years    
Maximum [Member]      
Finite-Lived Intangible Assets [Line Items]      
Other acquired intangible assets estimated useful lives 10 years    
NetNearU [Member] | Government Systems [Member]      
Finite-Lived Intangible Assets [Line Items]      
Change in goodwill related to an acquisition $ 34,600,000us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_BusinessAcquisitionAxis
= vsat_NetNearUMember
/ us-gaap_StatementBusinessSegmentsAxis
= vsat_GovernmentSystemsMember