Financial Statements of Parent and Subsidiary Guarantors (Details 1) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2011	Oct. 01, 2010	Sep. 30, 2011	Oct. 01, 2010
Revenues:
Product revenues	$ 146,611	$ 127,586	$ 269,157	$ 252,588
Service revenues	76,413	70,303	148,968	137,305
Total revenues	223,024	197,889	418,125	389,893
Operating expenses:
Cost of product revenues	107,909	88,451	200,194	183,165
Cost of service revenues	54,204	41,697	103,520	80,759
Selling, general and administrative	44,379	41,952	86,112	80,873
Independent research and development	6,809	7,622	12,503	14,936
Amortization of acquired intangible assets	4,767	5,094	9,539	9,704
Income (loss) from operations	4,956	13,073	6,257	20,456
Other income (expense):
Interest income	13	63	39	202
Interest expense	(211)	(950)	(211)	(3,091)
Income (loss) before income taxes	4,758	12,186	6,085	17,567
(Benefit from) provision for income taxes	(3,411)	4,385	(3,678)	6,366
Net income (loss)	8,169	7,801	9,763	11,201
Less: Net income attributable to the noncontrolling interest, net of tax	194	15	29	154
Net income (loss) attributable to ViaSat, Inc.	7,975	7,786	9,734	11,047
Issuing Parent Company [Member]
Revenues:
Product revenues	135,843	122,639	254,756	247,780
Service revenues	21,988	14,248	39,685	25,470
Total revenues	157,831	136,887	294,441	273,250
Operating expenses:
Cost of product revenues	100,366	85,148	189,930	180,436
Cost of service revenues	14,580	9,823	25,472	17,827
Selling, general and administrative	29,919	25,436	56,534	50,997
Independent research and development	6,592	7,384	11,957	14,645
Amortization of acquired intangible assets	970	1,233	1,940	2,493
Income (loss) from operations	5,404	7,863	8,608	6,852
Other income (expense):
Interest income	112	155	245	380
Interest expense	(152)	(950)	(152)	(3,091)
Income (loss) before income taxes	5,364	7,068	8,701	4,141
(Benefit from) provision for income taxes	(3,443)	1,918	(3,463)	374
Equity in net income (loss) of consolidated subsidiaries	(1,414)	2,729	(3,315)	7,442
Net income (loss)	7,393	7,879	8,849	11,209
Net income (loss) attributable to ViaSat, Inc.	7,393	7,879	8,849	11,209
Guarantor Subsidiaries [Member]
Revenues:
Product revenues	926	1,629	1,578	2,180
Service revenues	51,638	53,465	104,989	107,008
Total revenues	52,564	55,094	106,567	109,188
Operating expenses:
Cost of product revenues	785	1,515	1,542	1,990
Cost of service revenues	38,321	30,026	75,457	59,707
Selling, general and administrative	11,983	14,060	25,060	26,538
Amortization of acquired intangible assets	3,239	3,239	6,477	6,477
Income (loss) from operations	(1,764)	6,254	(1,969)	14,476
Other income (expense):
Interest expense	(59)		(59)
Income (loss) before income taxes	(1,823)	6,254	(2,028)	14,476
(Benefit from) provision for income taxes	(732)	2,443	(822)	5,752
Net income (loss)	(1,091)	3,811	(1,206)	8,724
Net income (loss) attributable to ViaSat, Inc.	(1,091)	3,811	(1,206)	8,724
Non-Guarantor Subsidiaries [Member]
Revenues:
Product revenues	9,917	4,043	13,167	5,385
Service revenues	3,187	3,022	5,413	5,677
Total revenues	13,104	7,065	18,580	11,062
Operating expenses:
Cost of product revenues	7,892	2,408	10,465	3,352
Cost of service revenues	1,701	2,270	3,659	4,035
Selling, general and administrative	2,477	2,476	4,521	3,358
Independent research and development	234	240	572	293
Amortization of acquired intangible assets	558	622	1,122	734
Income (loss) from operations	242	(951)	(1,759)	(710)
Other income (expense):
Interest income	2	2	4	5
Interest expense	(101)	(94)	(210)	(183)
Income (loss) before income taxes	143	(1,043)	(1,965)	(888)
(Benefit from) provision for income taxes	272	24	115	240
Net income (loss)	(129)	(1,067)	(2,080)	(1,128)
Net income (loss) attributable to ViaSat, Inc.	(129)	(1,067)	(2,080)	(1,128)
Consolidation and Elimination Adjustments [Member]
Revenues:
Product revenues	(75)	(725)	(344)	(2,757)
Service revenues	(400)	(432)	(1,119)	(850)
Total revenues	(475)	(1,157)	(1,463)	(3,607)
Operating expenses:
Cost of product revenues	(1,134)	(620)	(1,743)	(2,613)
Cost of service revenues	(398)	(422)	(1,068)	(810)
Selling, general and administrative		(20)	(3)	(20)
Independent research and development	(17)	(2)	(26)	(2)
Income (loss) from operations	1,074	(93)	1,377	(162)
Other income (expense):
Interest income	(101)	(94)	(210)	(183)
Interest expense	101	94	210	183
Income (loss) before income taxes	1,074	(93)	1,377	(162)
(Benefit from) provision for income taxes	492		492
Equity in net income (loss) of consolidated subsidiaries	1,414	(2,729)	3,315	(7,442)
Net income (loss)	1,996	(2,822)	4,200	(7,604)
Less: Net income attributable to the noncontrolling interest, net of tax	194	15	29	154
Net income (loss) attributable to ViaSat, Inc.	$ 1,802	$ (2,837)	$ 4,171	$ (7,758)