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Basis of Presentation - Summary of Impact of Adopting New Standards on Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended
--- | ---
Jun. 30, 2018 | Jun. 30, 2017
Disaggregation Of Revenue [Line Items] |  |
Total revenues | $ 438,869 | $ 380,044
Selling, general and administrative | 112,642 | 89,173
Independent research and development | 33,373 | 45,065
Loss from operations | (54,479) | (17,950)
Interest expense | (11,324) | (56)
Loss before income taxes | (65,767) | (17,913)
Benefit from income taxes | 29,205 | 9,180
Net loss | (35,497) | (9,246)
Net loss attributable to Viasat, Inc. | $ (34,010) | $ (9,039)
Basic net loss per share attributable to Viasat, Inc. common stockholders | $ (0.57) | $ (0.16)
Diluted net loss per share attributable to Viasat, Inc. common stockholders | $ (0.57) | $ (0.16)
Impact of ASC 606 [Member] | ASC 606 [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Total revenues | $ (487) |
Selling, general and administrative | 2,338 |
Independent research and development | 2,745 |
Loss from operations | (5,698) |
Interest expense | 992 |
Loss before income taxes | (4,706) |
Benefit from income taxes | (185) |
Net loss | (4,891) |
Net loss attributable to Viasat, Inc. | $ (4,891) |
Basic net loss per share attributable to Viasat, Inc. common stockholders | $ (0.08) |
Diluted net loss per share attributable to Viasat, Inc. common stockholders | $ (0.08) |
Historical Accounting Method [Member] | ASC 606 [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Total revenues | $ 438,382 |
Selling, general and administrative | 114,980 |
Independent research and development | 36,118 |
Loss from operations | (60,177) |
Interest expense | (10,332) |
Loss before income taxes | (70,473) |
Benefit from income taxes | 29,020 |
Net loss | (40,388) |
Net loss attributable to Viasat, Inc. | $ (38,901) |
Basic net loss per share attributable to Viasat, Inc. common stockholders | $ (0.66) |
Diluted net loss per share attributable to Viasat, Inc. common stockholders | $ (0.66) |
Product [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Total revenues | $ 218,129 | $ 166,118
Cost of revenues | 173,448 | 122,645
Product [Member] | Impact of ASC 606 [Member] | ASC 606 [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Total revenues | 579 |
Cost of revenues | 249 |
Product [Member] | Historical Accounting Method [Member] | ASC 606 [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Total revenues | 218,708 |
Cost of revenues | 173,697 |
Service [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Total revenues | 220,740 | 213,926
Cost of revenues | 171,432 | $ 137,851
Service [Member] | Impact of ASC 606 [Member] | ASC 606 [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Total revenues | (1,066) |
Cost of revenues | (121) |
Service [Member] | Historical Accounting Method [Member] | ASC 606 [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Total revenues | 219,674 |
Cost of revenues | $ 171,311 |

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