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Segment Information - Segment Revenues and Operating Profits (Losses) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020
Revenues: |  |  |  |
Total revenues | $ 719,717 | $ 575,559 | $ 2,085,931 | $ 1,660,325
Operating profits (losses): |  |  |  |
Income (loss) from operations | 4,527 | 21,760 | 29,117 | 29,129
Amortization of acquired intangible assets | (7,531) | (1,313) | (20,859) | (4,171)
Product [Member] |  |  |  |
Revenues: |  |  |  |
Total revenues | 316,143 | 266,514 | 918,073 | 773,128
Service [Member] |  |  |  |
Revenues: |  |  |  |
Total revenues | 403,574 | 309,045 | 1,167,858 | 887,197
Operating Segments [Member] |  |  |  |
Operating profits (losses): |  |  |  |
Income (loss) from operations | 12,058 | 23,073 | 49,976 | 33,300
Operating Segments [Member] | Satellite Services [Member] |  |  |  |
Revenues: |  |  |  |
Total revenues | 309,711 | 220,789 | 883,938 | 638,660
Operating profits (losses): |  |  |  |
Income (loss) from operations | 14,152 | 11,457 | 43,711 | 21,083
Amortization of acquired intangible assets | (7,231) | (557) | (19,650) | (1,612)
Operating Segments [Member] | Satellite Services [Member] | Service [Member] |  |  |  |
Revenues: |  |  |  |
Total revenues | 309,711 | 220,789 | 883,938 | 638,660
Operating Segments [Member] | Commercial Networks [Member] |  |  |  |
Revenues: |  |  |  |
Total revenues | 139,677 | 90,099 | 393,079 | 236,121
Operating profits (losses): |  |  |  |
Income (loss) from operations | (44,572) | (39,028) | (127,601) | (135,785)
Amortization of acquired intangible assets |  |  |  | (257)
Operating Segments [Member] | Commercial Networks [Member] | Product [Member] |  |  |  |
Revenues: |  |  |  |
Total revenues | 123,059 | 75,690 | 343,525 | 197,560
Operating Segments [Member] | Commercial Networks [Member] | Service [Member] |  |  |  |
Revenues: |  |  |  |
Total revenues | 16,618 | 14,409 | 49,554 | 38,561
Operating Segments [Member] | Government Systems [Member] |  |  |  |
Revenues: |  |  |  |
Total revenues | 270,329 | 264,671 | 808,914 | 785,544
Operating profits (losses): |  |  |  |
Income (loss) from operations | 42,478 | 50,644 | 133,866 | 148,002
Amortization of acquired intangible assets | (300) | (756) | (1,209) | (2,302)
Operating Segments [Member] | Government Systems [Member] | Product [Member] |  |  |  |
Revenues: |  |  |  |
Total revenues | 193,084 | 190,824 | 574,548 | 575,568
Operating Segments [Member] | Government Systems [Member] | Service [Member] |  |  |  |
Revenues: |  |  |  |
Total revenues | 77,245 | 73,847 | 234,366 | 209,976
Material Reconciling Items [Member] |  |  |  |
Operating profits (losses): |  |  |  |
Amortization of acquired intangible assets | $ (7,531) | $ (1,313) | $ (20,859) | $ (4,171)

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