Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349

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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

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- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

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- Definition

Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(a))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Impact of loss contingency on the amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References

No definition available.

+ Details

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- Definition

Impact of loss contingency on the amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References

No definition available.

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- Definition

Loss contingency estimate of possible loss impact to net Income loss attributable to noncontrolling interest.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Loss contingency estimate of possible loss impact to net income loss available to common stockholders.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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Segment Information - Segment Revenues and Operating Profits (Losses) (Parenthetical) (Detail) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Feb. 28, 2017	Mar. 31, 2017	Mar. 31, 2016	Apr. 03, 2015
Segment Reporting Information [Line Items]
Product revenues		$ 713,936	$ 664,821	$ 728,074
Income (loss) from operations		36,459	$ 41,119	83,144
Uncharacterized damages and penalties		11,800
Loss contingency impact to net income attributable to ViaSat, Inc. stockholders	$ 4,000	4,000
Loss contingency impact to net (loss) income attributable to noncontrolling interests, net of tax	3,700	$ 3,700
Impact of loss contingency on earnings per share basic		$ 0.08
Impact of loss contingency on earnings per share diluted		$ 0.07
Trellis Ware [Member]
Segment Reporting Information [Line Items]
Minority interest ownership percentage by parent		52.00%	52.00%
Operating Segments [Member]
Segment Reporting Information [Line Items]
Income (loss) from operations		$ 47,247	$ 57,557	101,110
Operating Segments [Member] \| Satellite Services [Member]
Segment Reporting Information [Line Items]
Product revenues		27,711	25,606	33,576
Income (loss) from operations		131,085	81,830	62,379
Operating Segments [Member] \| Government Systems [Member]
Segment Reporting Information [Line Items]
Product revenues		474,767	410,521	363,446
Income (loss) from operations		96,658	87,066	72,347
Uncharacterized damages and penalties	$ 11,800	11,800
Operating Segments [Member] \| Implied License [Member] \| Satellite Services [Member]
Segment Reporting Information [Line Items]
Product revenues		26,800	25,300	33,000
Income (loss) from operations		$ 26,800	$ 25,300
Operating Segments [Member] \| Implied License and Other Damages [Member] \| Satellite Services [Member]
Segment Reporting Information [Line Items]
Income (loss) from operations				$ 51,800