Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Revenues:
Total revenues	$ 554,694	$ 381,837	$ 1,511,037	$ 1,154,955
Operating expenses:
Selling, general and administrative	114,566	100,125	340,328	279,382
Independent research and development	28,928	40,149	93,661	131,482
Amortization of acquired intangible assets	2,487	3,177	7,375	9,757
Income (loss) from operations	6,007	(25,326)	(70,043)	(59,136)
Other income (expense):
Interest income	31	512	96	782
Interest expense	(14,896)		(40,294)	(253)
Loss on extinguishment of debt				(10,217)
Loss before income taxes	(8,858)	(24,814)	(110,241)	(68,824)
(Provision for) benefit from income taxes	(3,230)	(2,172)	35,679	18,472
Equity in income of unconsolidated affiliate, net	1,351	1,365	2,730	1,593
Net loss	(10,737)	(25,621)	(71,832)	(48,759)
Less: net loss attributable to noncontrolling interests, net of tax	(333)	(990)	(1,694)	(1,400)
Net loss attributable to Viasat, Inc.	$ (10,404)	$ (24,631)	$ (70,138)	$ (47,359)
Basic net loss per share attributable to Viasat, Inc. common stockholders	$ (0.17)	$ (0.42)	$ (1.17)	$ (0.81)
Diluted net loss per share attributable to Viasat, Inc. common stockholders	$ (0.17)	$ (0.42)	$ (1.17)	$ (0.81)
Shares used in computing basic net loss per share	60,152	58,638	59,698	58,237
Shares used in computing diluted net loss per share	60,152	58,638	59,698	58,237
Comprehensive income (loss):
Net loss	$ (10,737)	$ (25,621)	$ (71,832)	$ (48,759)
Other comprehensive income (loss), net of tax:
Unrealized (loss) gain on hedging, net of tax	(50)	(28)	(338)	81
Foreign currency translation adjustments, net of tax	(1,279)	3,619	(8,180)	13,465
Other comprehensive (loss) income, net of tax	(1,329)	3,591	(8,518)	13,546
Comprehensive loss	(12,066)	(22,030)	(80,350)	(35,213)
Less: comprehensive loss attributable to noncontrolling interests, net of tax	(333)	(990)	(1,694)	(1,400)
Comprehensive loss attributable to Viasat, Inc.	(11,733)	(21,040)	(78,656)	(33,813)
Product [Member]
Revenues:
Total revenues	301,865	175,957	800,429	523,858
Operating expenses:
Cost of revenues	226,020	126,437	616,368	382,932
Service [Member]
Revenues:
Total revenues	252,829	205,880	710,608	631,097
Operating expenses:
Cost of revenues	$ 176,686	$ 137,275	$ 523,348	$ 410,538