Certain Relationships and Related-Party Transactions (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Jun. 29, 2012	Jul. 01, 2011
Loral - satellite construction contract [Member]
Cash received and cash paid
Cash paid	$ 261	$ 1,283
Telesat Canada-ordinary course of business [Member]
Cash received and cash paid
Cash paid	$ 2,146	$ 2,431

Amounts paid to related parties by ViaSat related to satellite construction contract and in the ordinary course of business.

No definition available.

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