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Segment Information - Segment Revenues and Operating Profits (Losses) (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Jun. 30, 2021 | Jun. 30, 2020
Revenues: |  |
Total revenues | $ 664,860 | $ 530,488
Operating profits (losses): |  |
Income (loss) from operations | 16,292 | (5,314)
Amortization of acquired intangible assets | (5,929) | (1,558)
Product [Member] |  |
Revenues: |  |
Total revenues | 293,264 | 250,634
Service [Member] |  |
Revenues: |  |
Total revenues | 371,596 | 279,854
Operating Segments [Member] |  |
Operating profits (losses): |  |
Income (loss) from operations | 22,221 | (3,756)
Operating Segments [Member] | Satellite Services [Member] |  |
Revenues: |  |
Total revenues | 274,117 | 201,984
Operating profits (losses): |  |
Income (loss) from operations | 12,513 | (1,857)
Amortization of acquired intangible assets | (5,322) | (509)
Operating Segments [Member] | Satellite Services [Member] | Service [Member] |  |
Revenues: |  |
Total revenues | 274,117 | 201,984
Operating Segments [Member] | Commercial Networks [Member] |  |
Revenues: |  |
Total revenues | 118,596 | 67,162
Operating profits (losses): |  |
Income (loss) from operations | (37,708) | (51,394)
Amortization of acquired intangible assets |  | (257)
Operating Segments [Member] | Commercial Networks [Member] | Product [Member] |  |
Revenues: |  |
Total revenues | 101,531 | 55,119
Operating Segments [Member] | Commercial Networks [Member] | Service [Member] |  |
Revenues: |  |
Total revenues | 17,065 | 12,043
Operating Segments [Member] | Government Systems [Member] |  |
Revenues: |  |
Total revenues | 272,147 | 261,342
Operating profits (losses): |  |
Income (loss) from operations | 47,416 | 49,495
Amortization of acquired intangible assets | (607) | (792)
Operating Segments [Member] | Government Systems [Member] | Product [Member] |  |
Revenues: |  |
Total revenues | 191,733 | 195,515
Operating Segments [Member] | Government Systems [Member] | Service [Member] |  |
Revenues: |  |
Total revenues | 80,414 | 65,827
Material Reconciling Items [Member] |  |
Operating profits (losses): |  |
Amortization of acquired intangible assets | $ (5,929) | $ (1,558)

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