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Segment Information - Other Acquired Intangible Assets, Net and Goodwill Included in Segment Assets and Amortization of Acquired Intangible Assets by Segment (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2021
Segment Reporting Information [Line Items] |  |  |
Other acquired intangible assets, net | $ 201,205 | $ 236,043 |
Goodwill | 158,542 | 168,710 |
Amortization of acquired intangible assets | 29,811 | 28,729 | $ 5,482
Operating Segments [Member] | Satellite Services [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Other acquired intangible assets, net | 200,097 | 233,740 |
Goodwill | 80,589 | 81,972 |
Amortization of acquired intangible assets | 28,641 | 27,220 | 2,164
Operating Segments [Member] | Commercial Networks [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Goodwill | 41,014 | 44,050 |
Amortization of acquired intangible assets |  |  | 257
Operating Segments [Member] | Government Systems [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Other acquired intangible assets, net | 1,108 | 2,303 |
Goodwill | 36,939 | 42,688 |
Amortization of acquired intangible assets | $ 1,170 | $ 1,509 | $ 3,061

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