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Segment Information - Segment Revenues and Operating Profits (Losses) (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Jun. 30, 2016 | Jun. 30, 2015
Revenues: |  |
Product revenues | $ 160,676 | $ 168,348
Service revenues | 202,454 | 176,030
Total revenues | 363,130 | 344,378
Operating profits (losses): |  |
Income from operations | 7,778 | 9,414
Amortization of acquired intangible assets | (2,513) | (4,810)
Operating Segments [Member] |  |
Operating profits (losses): |  |
Income from operations | 10,291 | 14,224
Operating Segments [Member] | Satellite Services [Member] |  |
Revenues: |  |
Product revenues | 6,685 | 6,276
Service revenues | 145,708 | 126,140
Total revenues | 152,393 | 132,416
Operating profits (losses): |  |
Income from operations | 30,867 | 17,041
Amortization of acquired intangible assets | (1,104) | (2,765)
Operating Segments [Member] | Commercial Networks [Member] |  |
Revenues: |  |
Product revenues | 58,596 | 61,511
Service revenues | 6,957 | 5,244
Total revenues | 65,553 | 66,755
Operating profits (losses): |  |
Income from operations | (38,531) | (18,733)
Amortization of acquired intangible assets | (445) | (496)
Operating Segments [Member] | Government Systems [Member] |  |
Revenues: |  |
Product revenues | 95,395 | 100,561
Service revenues | 49,789 | 44,646
Total revenues | 145,184 | 145,207
Operating profits (losses): |  |
Income from operations | 17,955 | 15,916
Amortization of acquired intangible assets | (964) | (1,549)
Material Reconciling Items [Member] |  |
Operating profits (losses): |  |
Amortization of acquired intangible assets | $ (2,513) | $ (4,810)

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