Face (par) amount of debt instrument at time of issuance.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

Name:	us-gaap_LongTermDebtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Interest rate on in-orbit performance incentive obligations.

+ References

No definition available.

+ Details

Name:	vsat_InterestRateOnSatelliteOrbitalPerformanceObligation
Namespace Prefix:	vsat_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Period over which in-orbit satellite performance incentive payments, including interest, are to be paid.

+ References

No definition available.

+ Details

Name:	vsat_PeriodOfInOrbitPerformanceIncentivePaymentsIncludingInterest
Namespace Prefix:	vsat_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Aggregate carrying amount, as of the balance sheet date, of current and noncurrent obligations related to a contract(s) with a satellite manufacturer(s) (including amounts due to related-parties and non-related parties) for in-orbit performance incentive payments, commencing from the transfer of title of the satellite(s) to the Company, subject to continued satisfactory performance of the satellite(s).

+ References

No definition available.

+ Details

Name:	vsat_SatelliteOrbitalPerformancePayablesCurrentAndNonCurrent
Namespace Prefix:	vsat_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Fair Value Measurements - Additional Information (Detail) (USD $)	6 Months Ended
	Oct. 04, 2013	Oct. 04, 2013 2020 Notes [Member]	Mar. 29, 2013 2020 Notes [Member]	Oct. 04, 2013 Level 2 [Member]	Mar. 29, 2013 Level 2 [Member]	Oct. 04, 2013 Level 1 [Member] 2020 Notes [Member] Fair Value, Measurements, Recurring [Member]	Mar. 29, 2013 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 senior notes						$ 595,800,000	$ 616,700,000
Principal amount of senior notes issued		575,000,000	575,000,000			575,000,000
Interest on satellite in orbital performance obligation	7.00%
Period of in orbit performance incentive payments including interest	15 years
Satellite orbital performance payables current and non current				$ 22,700,000	$ 22,700,000