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Fair Value Measurements - Additional Information (Detail) (USD $)
12 Months Ended
Apr. 03, 2015
Apr. 04, 2014
2020 Notes [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Principal amount of senior notes issued $ 575,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= vsat_TwoThousandAndTwentyNotesMember
$ 575,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= vsat_TwoThousandAndTwentyNotesMember
Satellite Performance Incentives Obligation [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Interest on in-orbit satellite performance incentive obligation 7.00%vsat_InterestRateOnPerformanceObligation
/ us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis
= vsat_SatellitePerformanceIncentivesObligationMember
 
Period of in-orbit satellite performance incentive obligation including interest 15 years  
Satellite performance incentives obligation and accrued interest 22,400,000us-gaap_OtherSundryLiabilities
/ us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis
= vsat_SatellitePerformanceIncentivesObligationMember
 
Level 2 [Member] | Satellite Performance Incentives Obligation [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Satellite performance incentives obligation and accrued interest 22,400,000us-gaap_OtherSundryLiabilities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis
= vsat_SatellitePerformanceIncentivesObligationMember
22,600,000us-gaap_OtherSundryLiabilities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis
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Level 1 [Member] | 2020 Notes [Member] | Fair Value, Measurements, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value of long term debt $ 610,900,000us-gaap_LongTermDebtFairValue
/ us-gaap_DebtInstrumentAxis
= vsat_TwoThousandAndTwentyNotesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
$ 616,700,000us-gaap_LongTermDebtFairValue
/ us-gaap_DebtInstrumentAxis
= vsat_TwoThousandAndTwentyNotesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember