Certain Relationships and Related-Party Transactions - Additional Information (Detail)	3 Months Ended
Jun. 28, 2013
Related Party Transaction [Line Items]
Period of in orbit performance incentive payments including interest	15 years
Loral - beam sharing agreement [Member]
Related Party Transaction [Line Items]
Percentage of total costs under the beam sharing agreement for which Loral is responsible	15.00%

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

No definition available.

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