Condensed Consolidated Statement of Operations and Comprehensive Income (Loss) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 28, 2012	Dec. 30, 2011
Revenues:
Product revenues	$ 164,694	$ 121,862	$ 480,898	$ 391,019
Service revenues	121,748	83,102	330,129	232,070
Total revenues	286,442	204,964	811,027	623,089
Operating expenses:
Cost of product revenues	119,250	89,463	349,720	289,657
Cost of service revenues	92,145	57,318	266,096	160,838
Selling, general and administrative	62,209	45,640	172,789	131,752
Independent research and development	7,612	5,999	23,739	18,502
Amortization of acquired intangible assets	3,960	4,752	12,065	14,291
Income (loss) from operations	1,266	1,792	(13,382)	8,049
Other income (expense):
Interest income	38	20	143	59
Interest expense	(10,672)	(331)	(33,771)	(542)
Loss on extinguishment of debt	(26,501)		(26,501)
Income (loss) before income taxes	(35,869)	1,481	(73,511)	7,566
Provision for (benefit from) income taxes	(15,255)	(3,637)	(30,607)	(7,315)
Net (loss) income	(20,614)	5,118	(42,904)	14,881
Less: Net income (loss) attributable to noncontrolling interest, net of tax	162	(22)	199	7
Net income (loss) attributable to ViaSat, Inc.	(20,776)	5,140	(43,103)	14,874
Comprehensive income (loss) attributable to ViaSat, Inc.	(20,710)	5,036	(42,710)	13,355
Issuing Parent Company [Member]
Revenues:
Product revenues	156,334	115,537	460,645	370,293
Service revenues	53,895	30,438	142,923	70,123
Total revenues	210,229	145,975	603,568	440,416
Operating expenses:
Cost of product revenues	113,397	85,440	336,104	275,370
Cost of service revenues	35,650	17,781	97,016	43,253
Selling, general and administrative	34,741	31,801	96,484	88,335
Independent research and development	7,496	5,821	22,859	17,778
Amortization of acquired intangible assets	260	971	809	2,911
Income (loss) from operations	18,685	4,161	50,296	12,769
Other income (expense):
Interest income	36	19	138	264
Interest expense	(10,658)	(305)	(33,716)	(457)
Loss on extinguishment of debt	(26,501)		(26,501)
Income (loss) before income taxes	(18,438)	3,875	(9,783)	12,576
Provision for (benefit from) income taxes	(5,765)	(1,901)	(3,563)	(5,364)
Equity in net income (loss) of consolidated subsidiaries	(8,103)	(636)	(36,883)	(3,951)
Net (loss) income	(20,776)	5,140	(43,103)	13,989
Net income (loss) attributable to ViaSat, Inc.	(20,776)	5,140	(43,103)	13,989
Comprehensive income (loss) attributable to ViaSat, Inc.	(20,710)	5,036	(42,710)	12,470
Guarantor Subsidiaries [Member]
Revenues:
Product revenues	652	735	4,158	2,313
Service revenues	66,685	50,864	181,072	155,853
Total revenues	67,337	51,599	185,230	158,166
Operating expenses:
Cost of product revenues	908	854	3,018	2,396
Cost of service revenues	56,042	38,200	165,523	113,657
Selling, general and administrative	24,542	11,767	68,264	36,827
Independent research and development	28		538
Amortization of acquired intangible assets	3,159	3,238	9,635	9,715
Income (loss) from operations	(17,342)	(2,460)	(61,748)	(4,429)
Other income (expense):
Interest expense	(14)	(26)	(50)	(85)
Income (loss) before income taxes	(17,356)	(2,486)	(61,798)	(4,514)
Provision for (benefit from) income taxes	(9,685)	(1,318)	(27,052)	(2,140)
Net (loss) income	(7,671)	(1,168)	(34,746)	(2,374)
Net income (loss) attributable to ViaSat, Inc.	(7,671)	(1,168)	(34,746)	(2,374)
Comprehensive income (loss) attributable to ViaSat, Inc.	(7,671)	(1,168)	(34,746)	(2,374)
Non-Guarantor Subsidiaries [Member]
Revenues:
Product revenues	7,859	5,651	16,468	18,818
Service revenues	1,566	2,211	7,305	7,624
Total revenues	9,425	7,862	23,773	26,442
Operating expenses:
Cost of product revenues	5,079	3,230	10,922	13,695
Cost of service revenues	860	1,760	4,737	5,419
Selling, general and administrative	2,926	2,057	8,041	6,578
Independent research and development	96	181	382	753
Amortization of acquired intangible assets	541	543	1,621	1,665
Income (loss) from operations	(77)	91	(1,930)	(1,668)
Other income (expense):
Interest income	2	1	5	5
Interest expense			(5)	(210)
Income (loss) before income taxes	(75)	92	(1,930)	(1,873)
Provision for (benefit from) income taxes	195	(418)	8	(303)
Net (loss) income	(270)	510	(1,938)	(1,570)
Net income (loss) attributable to ViaSat, Inc.	(270)	510	(1,938)	(1,570)
Comprehensive income (loss) attributable to ViaSat, Inc.	(296)	195	(1,717)	(2,444)
Consolidation and Elimination Adjustments [Member]
Revenues:
Product revenues	(151)	(61)	(373)	(405)
Service revenues	(398)	(411)	(1,171)	(1,530)
Total revenues	(549)	(472)	(1,544)	(1,935)
Operating expenses:
Cost of product revenues	(134)	(61)	(324)	(1,804)
Cost of service revenues	(407)	(423)	(1,180)	(1,491)
Selling, general and administrative		15		12
Independent research and development	(8)	(3)	(40)	(29)
Income (loss) from operations				1,377
Other income (expense):
Interest income				(210)
Interest expense				210
Income (loss) before income taxes				1,377
Provision for (benefit from) income taxes				492
Equity in net income (loss) of consolidated subsidiaries	8,103	636	36,883	3,951
Net (loss) income	8,103	636	36,883	4,836
Less: Net income (loss) attributable to noncontrolling interest, net of tax	162	(22)	199	7
Net income (loss) attributable to ViaSat, Inc.	7,941	658	36,684	4,829
Comprehensive income (loss) attributable to ViaSat, Inc.	$ 7,967	$ 973	$ 36,463	$ 5,703