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Segment Information - Segment Revenues and Operating Profits (Losses) (Parenthetical) (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Apr. 03, 2015
Apr. 04, 2014
Mar. 29, 2013
Segment Reporting Information [Line Items]      
Product revenue $ 728,074us-gaap_SalesRevenueGoodsNet $ 785,738us-gaap_SalesRevenueGoodsNet $ 664,417us-gaap_SalesRevenueGoodsNet
Income (loss) from operations 83,144us-gaap_OperatingIncomeLoss 3,299us-gaap_OperatingIncomeLoss (20,362)us-gaap_OperatingIncomeLoss
Operating Segments [Member]      
Segment Reporting Information [Line Items]      
Income (loss) from operations 101,110us-gaap_OperatingIncomeLoss
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember		 17,913us-gaap_OperatingIncomeLoss
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember		 (4,778)us-gaap_OperatingIncomeLoss
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
Operating Segments [Member] | Satellite Services [Member]      
Segment Reporting Information [Line Items]      
Product revenue 33,576us-gaap_SalesRevenueGoodsNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= vsat_SatelliteServicesMember		 42us-gaap_SalesRevenueGoodsNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= vsat_SatelliteServicesMember		 4,715us-gaap_SalesRevenueGoodsNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= vsat_SatelliteServicesMember
Income (loss) from operations 62,379us-gaap_OperatingIncomeLoss
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= vsat_SatelliteServicesMember		 (45,991)us-gaap_OperatingIncomeLoss
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= vsat_SatelliteServicesMember		 (79,172)us-gaap_OperatingIncomeLoss
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= vsat_SatelliteServicesMember
Operating Segments [Member] | Implied license [Member] | Satellite Services [Member]      
Segment Reporting Information [Line Items]      
Product revenue 33,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_GainContingenciesByNatureAxis
= vsat_ImpliedLicenseMember
/ us-gaap_StatementBusinessSegmentsAxis
= vsat_SatelliteServicesMember		    
Operating Segments [Member] | Implied license and other damages [Member] | Satellite Services [Member]      
Segment Reporting Information [Line Items]      
Income (loss) from operations $ 51,800us-gaap_OperatingIncomeLoss
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_GainContingenciesByNatureAxis
= vsat_ImpliedLicenseAndOtherDamagesMember
/ us-gaap_StatementBusinessSegmentsAxis
= vsat_SatelliteServicesMember