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Commitments - Additional Information (Detail) - USD ($) | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Apr. 30, 2017 | Jul. 31, 2016 | May 31, 2013 | Mar. 31, 2017 | Mar. 31, 2016 | Mar. 31, 2015 | May 17, 2017
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Satellite performance incentives obligation, Noncurrent |  |  |  | $ 19,164,000 | $ 19,514,000 |  |
Description of operating lease arrangements |  |  |  | The Company leases office and other facilities under non-cancelable operating leases with initial terms ranging from one to 15 years which expire between fiscal year 2018 and fiscal year 2029 and provide for pre-negotiated fixed rental rates during the terms of the lease. Certain of the Company's facilities leases contain option provisions which allow for extension of the lease terms. |  |  |
Non-cancelable operating leases initial term |  |  |  | 10 years |  |  |
Rent expense |  |  |  | $ 34,000,000 | $ 27,700,000 | $ 24,500,000 |
Minimum [Member] |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Non-cancelable operating leases initial term |  |  |  | 1 year |  |  |
Maximum [Member] |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Non-cancelable operating leases initial term |  |  |  | 15 years |  |  |
Satellite Capacity Agreements [Member] |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Future minimum payments on purchase commitments for fiscal year 2018 |  |  |  | $ 33,800,000 |  |  |
Future minimum payments on purchase commitments for fiscal year 2019 |  |  |  | 19,600,000 |  |  |
Future minimum payments on purchase commitments for fiscal year 2020 |  |  |  | 15,800,000 |  |  |
Future minimum payments on purchase commitments for fiscal year 2021 |  |  |  | 7,400,000 |  |  |
Future minimum payments on purchase commitments for fiscal year 2022 |  |  |  | 0 |  |  |
Future minimum payments on purchase commitments thereafter |  |  |  | 0 |  |  |
ViaSat-1 Satellite [Member] |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Satellite performance incentives obligation |  |  |  | 21,800,000 |  |  |
Satellite performance incentives obligation, current |  |  |  | 2,600,000 |  |  |
Satellite performance incentives obligation, Noncurrent |  |  |  | 19,200,000 |  |  |
ViaSat-1 Satellite [Member] | Satellite Performance Incentives Obligation [Member] |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Commitment amount |  |  |  | $ 30,800,000 |  |  |
Period of in-orbit satellite performance incentive payments |  |  |  | 15 years |  |  |
Future minimum payments under satellite performance incentives obligation for fiscal year 2018 |  |  |  | $ 2,300,000 |  |  |
Future minimum payments under satellite performance incentives obligation for fiscal year 2019 |  |  |  | 2,500,000 |  |  |
Future minimum payments under satellite performance incentives obligation for fiscal year 2020 |  |  |  | 2,600,000 |  |  |
Future minimum payments under satellite performance incentives obligation for fiscal year 2021 |  |  |  | 2,800,000 |  |  |
Future minimum payments under satellite performance incentives obligation for fiscal year 2022 |  |  |  | 3,100,000 |  |  |
Future minimum payments under satellite performance incentives obligation thereafter |  |  |  | $ 17,500,000 |  |  |
Satellite - ViaSat-2 [Member] | Capital Addition [Member] |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Commitment amount |  |  | $ 358,000,000 |  |  |  |
ViaSat-3 Class Satellites [Member] | Capital Addition [Member] |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Commitment amount |  | $ 368,300,000 |  |  |  |  |
Subsequent Event [Member] | Satellite - ViaSat-2 [Member] |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Satellite performance incentives obligation | $ 21,000,000 |  |  |  |  |  | $ 21,000,000
Period of in-orbit satellite performance incentive payments | 9 years |  |  |  |  |  |

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- Definition A general description of the nature of the existing leasing arrangements of a lessee for all operating leases including, but not limited to: (1) rental escalation clauses; (2) renewal or purchase options; (3) guarantees or indemnities, if any, (4) restrictions imposed by lease arrangements; (5) unusual provisions or conditions; (6) contingent rentals, if any; and (7) lease expiration dates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 1) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6452660&loc=d3e36991-112694 + Details
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- Definition Minimum amount of purchase arrangement maturing after the fifth fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments. + References No definition available. + Details
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- Definition Minimum amount of purchase arrangement maturing in the next fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments. + References No definition available. + Details
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