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Segment Information - Segment Revenues and Operating Profits (Losses) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Revenues: |  |  |  |
Total revenues | $ 701,354 | $ 554,278 | $ 1,366,214 | $ 1,084,766
Operating profits (losses): |  |  |  |
Income (loss) from operations | 8,298 | 12,683 | 24,590 | 7,369
Amortization of acquired intangible assets | (7,399) | (1,300) | (13,328) | (2,858)
Product [Member] |  |  |  |
Revenues: |  |  |  |
Total revenues | 308,666 | 255,980 | 601,930 | 506,614
Service [Member] |  |  |  |
Revenues: |  |  |  |
Total revenues | 392,688 | 298,298 | 764,284 | 578,152
Operating Segments [Member] |  |  |  |
Operating profits (losses): |  |  |  |
Income (loss) from operations | 15,697 | 13,983 | 37,918 | 10,227
Operating Segments [Member] | Satellite Services [Member] |  |  |  |
Revenues: |  |  |  |
Total revenues | 300,110 | 215,887 | 574,227 | 417,871
Operating profits (losses): |  |  |  |
Income (loss) from operations | 17,046 | 11,483 | 29,559 | 9,626
Amortization of acquired intangible assets | (7,097) | (546) | (12,419) | (1,055)
Operating Segments [Member] | Satellite Services [Member] | Service [Member] |  |  |  |
Revenues: |  |  |  |
Total revenues | 300,110 | 215,887 | 574,227 | 417,871
Operating Segments [Member] | Commercial Networks [Member] |  |  |  |
Revenues: |  |  |  |
Total revenues | 134,806 | 78,860 | 253,402 | 146,022
Operating profits (losses): |  |  |  |
Income (loss) from operations | (45,321) | (45,363) | (83,029) | (96,757)
Amortization of acquired intangible assets |  |  |  | (257)
Operating Segments [Member] | Commercial Networks [Member] | Product [Member] |  |  |  |
Revenues: |  |  |  |
Total revenues | 118,935 | 66,751 | 220,466 | 121,870
Operating Segments [Member] | Commercial Networks [Member] | Service [Member] |  |  |  |
Revenues: |  |  |  |
Total revenues | 15,871 | 12,109 | 32,936 | 24,152
Operating Segments [Member] | Government Systems [Member] |  |  |  |
Revenues: |  |  |  |
Total revenues | 266,438 | 259,531 | 538,585 | 520,873
Operating profits (losses): |  |  |  |
Income (loss) from operations | 43,972 | 47,863 | 91,388 | 97,358
Amortization of acquired intangible assets | (302) | (754) | (909) | (1,546)
Operating Segments [Member] | Government Systems [Member] | Product [Member] |  |  |  |
Revenues: |  |  |  |
Total revenues | 189,731 | 189,229 | 381,464 | 384,744
Operating Segments [Member] | Government Systems [Member] | Service [Member] |  |  |  |
Revenues: |  |  |  |
Total revenues | 76,707 | 70,302 | 157,121 | 136,129
Material Reconciling Items [Member] |  |  |  |
Operating profits (losses): |  |  |  |
Amortization of acquired intangible assets | $ (7,399) | $ (1,300) | $ (13,328) | $ (2,858)

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