v3.26.3
Segment Information - Segment Revenues, Expenses and Operating Profits (Losses) (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Revenues:        
Total revenues $ 1,179,996 $ 1,140,893 $ 2,336,539 $ 2,311,947
Expenses:        
Depreciation     482,224 510,371
Stock-based compensation expense     58,359 34,829
Total expenses 1,107,840 1,040,049 2,152,057 2,098,690
Operating profits (losses):        
Amortization of acquired intangible assets (65,007) (65,069) (130,025) (130,810)
Interest income 15,362 12,525 30,753 26,815
Interest expense (101,957) (93,487) (184,261) (193,844)
(Loss) gain on extinguishment of debt, net       (288)
Other income (expense), net 92   (214) (5,164)
Income (loss) before income taxes (79,354) (45,187) (99,265) (90,034)
Income (loss) from operations 7,149 35,775 54,457 82,447
Product [Member]        
Revenues:        
Total revenues 359,401 319,383 683,506 664,067
Service [Member]        
Revenues:        
Total revenues 820,595 821,510 1,653,033 1,647,880
Operating Segments [Member]        
Operating profits (losses):        
Income (loss) from operations 72,156 100,844 184,482 213,257
Operating Segments [Member] | Communication Services [Member]        
Revenues:        
Total revenues 814,526 836,655 1,639,609 1,664,026
Expenses:        
Depreciation 234,762 240,219 455,955 486,968
Stock-based compensation expense 19,128 12,490 33,281 20,802
Other than acquired intangible assets amortization [1] 15,172 4,739 26,406 18,748
Acquisition and transaction related expenses 2,184 3,480 5,074 11,354
Other segment items [2] 519,741 504,342 1,032,925 1,013,893
Total expenses [3] 790,987 765,270 1,553,641 1,551,765
Operating profits (losses):        
Income (loss) from operations 23,539 71,385 85,968 112,261
Operating Segments [Member] | Communication Services [Member] | Government Satcom Services [Member]        
Revenues:        
Total revenues 203,103 195,800 414,837 387,568
Operating Segments [Member] | Communication Services [Member] | Aviation Services [Member]        
Revenues:        
Total revenues 325,840 300,732 650,221 593,624
Operating Segments [Member] | Communication Services [Member] | Maritime Services [Member]        
Revenues:        
Total revenues 108,661 117,594 218,163 235,395
Operating Segments [Member] | Communication Services [Member] | Fixed Services and Other Services [Member]        
Revenues:        
Total revenues 120,532 155,691 247,957 330,428
Operating Segments [Member] | Communication Services [Member] | Product [Member]        
Revenues:        
Total revenues 56,390 66,838 108,431 117,011
Operating Segments [Member] | Communication Services [Member] | Service [Member]        
Revenues:        
Total revenues 758,136 769,817 1,531,178 1,547,015
Operating Segments [Member] | Defense and Advanced Technologies [Member]        
Revenues:        
Total revenues 365,470 304,238 696,930 647,921
Expenses:        
Depreciation 13,754 12,451 26,269 23,403
Stock-based compensation expense 15,040 7,632 25,078 14,027
Other than acquired intangible assets amortization [1] 6,684 6,650 11,965 11,543
Acquisition and transaction related expenses 949 1,600 2,115 3,451
Other segment items [2] 280,426 246,446 532,989 494,501
Total expenses [3] 316,853 274,779 598,416 546,925
Operating profits (losses):        
Income (loss) from operations 48,617 29,459 98,514 100,996
Operating Segments [Member] | Defense and Advanced Technologies [Member] | Information Security and Cyber Defense Products [Member]        
Revenues:        
Total revenues 120,520 94,928 214,511 197,076
Operating Segments [Member] | Defense and Advanced Technologies [Member] | Space and Mission Systems Products [Member]        
Revenues:        
Total revenues 81,310 78,231 148,170 166,204
Operating Segments [Member] | Defense and Advanced Technologies [Member] | Tactical Networking Products [Member]        
Revenues:        
Total revenues 96,982 74,193 189,552 142,472
Operating Segments [Member] | Defense and Advanced Technologies [Member] | Advanced Technologies and Other Products [Member]        
Revenues:        
Total revenues 4,199 5,193 22,842 41,304
Operating Segments [Member] | Defense and Advanced Technologies [Member] | Product [Member]        
Revenues:        
Total revenues 303,011 252,545 575,075 547,056
Operating Segments [Member] | Defense and Advanced Technologies [Member] | Service [Member]        
Revenues:        
Total revenues 62,459 51,693 121,855 100,865
Corporate, Non-Segment [Member]        
Operating profits (losses):        
Amortization of acquired intangible assets (65,007) (65,069) (130,025) (130,810)
Interest income 15,362 12,525 30,753 26,815
Interest expense (101,957) $ (93,487) (184,261) (193,844)
(Loss) gain on extinguishment of debt, net       (288)
Other income (expense), net $ 92   $ (214) $ (5,164)
[1] Including amortization of capitalized cloud computing implementation costs.
[2] Other segment items include operating expenses such as cost of service and product revenues, selling, general and administrative expenses, IR&D expenses and related activities excluding allocable portion of depreciation, other than acquired intangibles amortization, stock-based compensation, and certain significant items that are disclosed under each segment.
[3] For the three and six months ended September 30, 2026, IR&D expense and related activities, including allocable depreciation, stock-based compensation and other expenses were $33.6 million and $62.0 million, respectively, for the communication services segment, and $26.2 million and $43.2 million, respectively, for the defense and advanced technologies segment. For the three and six months ended September 30, 2025, IR&D expense and related activities, including allocable depreciation, stock-based compensation and other expenses were $21.7 million and $40.8 million, respectively, for the communication services segment, and $20.6 million and $35.6 million, respectively, for the defense and advanced technologies segment.