Financial Statements of Parent and Subsidiary Guarantors (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 30, 2011	Dec. 31, 2010	Dec. 30, 2011	Dec. 31, 2010
Revenues:
Product revenues	$ 121,862	$ 126,434	$ 391,019	$ 379,022
Service revenues	83,102	69,507	232,070	206,812
Total revenues	204,964	195,941	623,089	585,834
Operating expenses:
Cost of product revenues	89,463	95,009	289,657	278,174
Cost of service revenues	57,318	41,923	160,838	122,682
Selling, general and administrative	45,640	40,413	131,752	121,286
Independent research and development	5,999	6,661	18,502	21,597
Amortization of acquired intangible assets	4,752	4,923	14,291	14,627
Income (loss) from operations	1,792	7,012	8,049	27,468
Other income (expense):
Interest income	20	46	59	248
Interest expense	(331)	(60)	(542)	(3,151)
Income (loss) before income taxes	1,481	6,998	7,566	24,565
(Benefit from) provision for income taxes	(3,637)	(5,929)	(7,315)	437
Net income (loss)	5,118	12,927	14,881	24,128
Less: Net (loss) income attributable to the noncontrolling interest, net of tax	(22)	3	7	157
Net income (loss) attributable to ViaSat, Inc.	5,140	12,924	14,874	23,971
Issuing Parent Company [Member]
Revenues:
Product revenues	115,537	119,849	370,293	367,629
Service revenues	30,438	13,757	70,123	39,227
Total revenues	145,975	133,606	440,416	406,856
Operating expenses:
Cost of product revenues	85,440	88,745	275,370	269,181
Cost of service revenues	17,781	8,604	43,253	26,431
Selling, general and administrative	31,801	26,081	88,335	77,078
Independent research and development	5,821	6,546	17,778	21,191
Amortization of acquired intangible assets	971	1,189	2,911	3,682
Income (loss) from operations	4,161	2,441	12,769	9,293
Other income (expense):
Interest income	19	140	264	520
Interest expense	(305)	(58)	(457)	(3,149)
Income (loss) before income taxes	3,875	2,523	12,576	6,664
(Benefit from) provision for income taxes	(1,901)	(5,952)	(5,364)	(5,578)
Equity in net income (loss) of consolidated subsidiaries	(636)	4,423	(3,951)	11,865
Net income (loss)	5,140	12,898	13,989	24,107
Net income (loss) attributable to ViaSat, Inc.	5,140	12,898	13,989	24,107
Guarantor Subsidiaries [Member]
Revenues:
Product revenues	735	1,944	2,313	4,124
Service revenues	50,864	53,976	155,853	160,984
Total revenues	51,599	55,920	158,166	165,108
Operating expenses:
Cost of product revenues	854	3,347	2,396	5,337
Cost of service revenues	38,200	31,769	113,657	91,476
Selling, general and administrative	11,767	11,571	36,827	38,109
Amortization of acquired intangible assets	3,238	3,238	9,715	9,715
Income (loss) from operations	(2,460)	5,995	(4,429)	20,471
Other income (expense):
Interest expense	(26)		(85)
Income (loss) before income taxes	(2,486)	5,995	(4,514)	20,471
(Benefit from) provision for income taxes	(1,318)	27	(2,140)	5,779
Net income (loss)	(1,168)	5,968	(2,374)	14,692
Net income (loss) attributable to ViaSat, Inc.	(1,168)	5,968	(2,374)	14,692
Non-Guarantor Subsidiaries [Member]
Revenues:
Product revenues	5,651	4,733	18,818	10,118
Service revenues	2,211	2,188	7,624	7,865
Total revenues	7,862	6,921	26,442	17,983
Operating expenses:
Cost of product revenues	3,230	3,015	13,695	6,367
Cost of service revenues	1,760	1,964	5,419	5,999
Selling, general and administrative	2,057	2,777	6,578	6,135
Independent research and development	181	119	753	412
Amortization of acquired intangible assets	543	496	1,665	1,230
Income (loss) from operations	91	(1,450)	(1,668)	(2,160)
Other income (expense):
Interest income	1	2	5	7
Interest expense		(98)	(210)	(281)
Income (loss) before income taxes	92	(1,546)	(1,873)	(2,434)
(Benefit from) provision for income taxes	(418)	(4)	(303)	236
Net income (loss)	510	(1,542)	(1,570)	(2,670)
Net income (loss) attributable to ViaSat, Inc.	510	(1,542)	(1,570)	(2,670)
Consolidation and Elimination Adjustments [Member]
Revenues:
Product revenues	(61)	(92)	(405)	(2,849)
Service revenues	(411)	(414)	(1,530)	(1,264)
Total revenues	(472)	(506)	(1,935)	(4,113)
Operating expenses:
Cost of product revenues	(61)	(98)	(1,804)	(2,711)
Cost of service revenues	(423)	(414)	(1,491)	(1,224)
Selling, general and administrative	15	(16)	12	(36)
Independent research and development	(3)	(4)	(29)	(6)
Income (loss) from operations		26	1,377	(136)
Other income (expense):
Interest income		(96)	(210)	(279)
Interest expense		96	210	279
Income (loss) before income taxes		26	1,377	(136)
(Benefit from) provision for income taxes			492
Equity in net income (loss) of consolidated subsidiaries	636	(4,423)	3,951	(11,865)
Net income (loss)	636	(4,397)	4,836	(12,001)
Less: Net (loss) income attributable to the noncontrolling interest, net of tax	(22)	3	7	157
Net income (loss) attributable to ViaSat, Inc.	$ 658	$ (4,400)	$ 4,829	$ (12,158)