Liability accrual for a claim pursuant to indemnification provisions included in the Company's contracts in the ordinary course of business.

No definition available.

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

Name:	vsat_CertainRelationshipsAndRelatedPartyTransactionsTextualAbstract
Namespace Prefix:	vsat_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The percentage of equity interest in a third party by an executive officer of the company.

No definition available.

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

The payment made in the period which reduced indemnification payable.

No definition available.

Name:	vsat_PaymentUnderIndemnificationAgreement
Namespace Prefix:	vsat_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The payment received in the period which reduced indemnification receivable.

No definition available.

Name:	vsat_ProceedsUnderIndemnificationAgreement
Namespace Prefix:	vsat_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of transactions with related party during the financial reporting period defined in percent.

No definition available.

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

Certain Relationships and Related-Party Transactions (Details Textual) (USD $) In Millions, unless otherwise specified	1 Months Ended				1 Months Ended		1 Months Ended
	Jan. 31, 2012	Mar. 30, 2012	Dec. 30, 2011	Apr. 01, 2011	Jan. 31, 2012 Times Arrow [Member]	Jan. 31, 2008 Loral - Beam Sharing Agreement [Member]	Jan. 31, 2012 Executive Vice President [Member]
Certain Relationships and Related-Party Transactions (Textual) [Abstract]
Percentage of total costs under the beam sharing agreement for which Loral is responsible						15.00%
Amount recorded as a liability under the indemnification agreement		$ 0	$ 20.5	$ 0.5
Proceeds under indemnification agreement	20.0
Executive officer percent equity interest in third party		33.30%
Payment under indemnification agreement	$ 20.5				$ 3.0		$ 1.0