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Segment Information - Segment Revenues and Operating Profits (Losses) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Revenues: |  |  |  |
Total revenues | $ 554,278 | $ 592,256 | $ 1,084,766 | $ 1,129,293
Operating profits (losses): |  |  |  |
Income (loss) from operations | 12,683 | 18,425 | 7,369 | 10,360
Amortization of acquired intangible assets | (1,300) | (2,027) | (2,858) | (4,064)
Product [Member] |  |  |  |
Revenues: |  |  |  |
Total revenues | 255,980 | 306,830 | 506,614 | 570,445
Service [Member] |  |  |  |
Revenues: |  |  |  |
Total revenues | 298,298 | 285,426 | 578,152 | 558,848
Operating Segments [Member] |  |  |  |
Operating profits (losses): |  |  |  |
Income (loss) from operations | 13,983 | 20,452 | 10,227 | 14,424
Operating Segments [Member] | Satellite Services [Member] |  |  |  |
Revenues: |  |  |  |
Total revenues | 215,887 | 205,717 | 417,871 | 402,532
Operating profits (losses): |  |  |  |
Income (loss) from operations | 11,483 | 5,118 | 9,626 | 3,048
Amortization of acquired intangible assets | (546) | (850) | (1,055) | (1,705)
Operating Segments [Member] | Satellite Services [Member] | Service [Member] |  |  |  |
Revenues: |  |  |  |
Total revenues | 215,887 | 205,717 | 417,871 | 402,532
Operating Segments [Member] | Commercial Networks [Member] |  |  |  |
Revenues: |  |  |  |
Total revenues | 78,860 | 88,008 | 146,022 | 167,020
Operating profits (losses): |  |  |  |
Income (loss) from operations | (45,363) | (46,781) | (96,757) | (96,642)
Amortization of acquired intangible assets |  | (386) | (257) | (772)
Operating Segments [Member] | Commercial Networks [Member] | Product [Member] |  |  |  |
Revenues: |  |  |  |
Total revenues | 66,751 | 74,143 | 121,870 | 139,044
Operating Segments [Member] | Commercial Networks [Member] | Service [Member] |  |  |  |
Revenues: |  |  |  |
Total revenues | 12,109 | 13,865 | 24,152 | 27,976
Operating Segments [Member] | Government Systems [Member] |  |  |  |
Revenues: |  |  |  |
Total revenues | 259,531 | 298,531 | 520,873 | 559,741
Operating profits (losses): |  |  |  |
Income (loss) from operations | 47,863 | 62,115 | 97,358 | 108,018
Amortization of acquired intangible assets | (754) | (791) | (1,546) | (1,587)
Operating Segments [Member] | Government Systems [Member] | Product [Member] |  |  |  |
Revenues: |  |  |  |
Total revenues | 189,229 | 232,687 | 384,744 | 431,401
Operating Segments [Member] | Government Systems [Member] | Service [Member] |  |  |  |
Revenues: |  |  |  |
Total revenues | 70,302 | 65,844 | 136,129 | 128,340
Material Reconciling Items [Member] |  |  |  |
Operating profits (losses): |  |  |  |
Amortization of acquired intangible assets | $ (1,300) | $ (2,027) | $ (2,858) | $ (4,064)

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