Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues:
Total revenues	$ 517,474	$ 393,074	$ 956,343	$ 773,118
Operating expenses:
Selling, general and administrative	113,120	90,084	225,762	179,257
Independent research and development	31,360	46,268	64,733	91,333
Amortization of acquired intangible assets	2,435	3,320	4,888	6,580
Loss from operations	(21,571)	(15,860)	(76,050)	(33,810)
Other income (expense):
Interest income	29	177	65	270
Interest expense	(14,074)	(197)	(25,398)	(253)
Loss on extinguishment of debt		(10,217)		(10,217)
Loss before income taxes	(35,616)	(26,097)	(101,383)	(44,010)
Benefit from income taxes	9,704	11,464	38,909	20,644
Equity in income of unconsolidated affiliate, net	314	741	1,379	228
Net loss	(25,598)	(13,892)	(61,095)	(23,138)
Less: net income (loss) attributable to noncontrolling interests, net of tax	126	(203)	(1,361)	(410)
Net loss attributable to Viasat, Inc.	$ (25,724)	$ (13,689)	$ (59,734)	$ (22,728)
Basic net loss per share attributable to Viasat, Inc. common stockholders	$ (0.43)	$ (0.24)	$ (1.00)	$ (0.39)
Diluted net loss per share attributable to Viasat, Inc. common stockholders	$ (0.43)	$ (0.24)	$ (1.00)	$ (0.39)
Shares used in computing basic net loss per share	59,734	58,229	59,470	58,039
Shares used in computing diluted net loss per share	59,734	58,229	59,470	58,039
Comprehensive income (loss):
Net loss	$ (25,598)	$ (13,892)	$ (61,095)	$ (23,138)
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on hedging, net of tax	38	17	(288)	109
Foreign currency translation adjustments, net of tax	(7,104)	6,321	(6,901)	9,846
Other comprehensive (loss) income, net of tax	(7,066)	6,338	(7,189)	9,955
Comprehensive loss	(32,664)	(7,554)	(68,284)	(13,183)
Less: comprehensive income (loss) attributable to noncontrolling interests, net of tax	126	(203)	(1,361)	(410)
Comprehensive loss attributable to Viasat, Inc.	(32,790)	(7,351)	(66,923)	(12,773)
Product [Member]
Revenues:
Total revenues	280,435	181,783	498,564	347,901
Operating expenses:
Cost of revenues	216,900	133,850	390,348	256,495
Service [Member]
Revenues:
Total revenues	237,039	211,291	457,779	425,217
Operating expenses:
Cost of revenues	$ 175,230	$ 135,412	$ 346,662	$ 273,263