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Segment Information - Additional Information (Detail) (Located outside the United States [Member], USD $)
In Millions, unless otherwise specified
Apr. 03, 2015
Apr. 04, 2014
Mar. 29, 2013
Located outside the United States [Member]
     
Revenues from External Customers and Long-Lived Assets [Line Items]      
Long-lived assets located outside the United States $ 14.3us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= vsat_OtherThanTheUnitedStatesMember
$ 18.5us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= vsat_OtherThanTheUnitedStatesMember
$ 18.5us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= vsat_OtherThanTheUnitedStatesMember