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Composition of Certain Balance Sheet Captions - Composition of Certain Balance Sheet Captions (Detail) - USD ($) $ in Thousands | Sep. 30, 2025 | Mar. 31, 2025
--- | --- | ---
Accounts receivable, net: |  |
Accounts receivable, Billed | $ 528,343 | $ 539,522
Accounts receivable, Unbilled | 175,829 | 180,871
Allowance for doubtful accounts | (21,352) | (20,841)
Accounts receivable, net | 682,820 | 699,552
Inventories: |  |
Raw materials | 99,904 | 96,893
Work in process | 16,495 | 19,761
Finished goods | 162,259 | 177,289
Inventories | 278,658 | 293,943
Prepaid expenses and other current assets: |  |
Prepaid expenses | 160,295 | 176,694
Other | 83,528 | 105,649
Prepaid expenses and other current assets | 243,823 | 282,343
Property, equipment and satellites, net: |  |
Property, equipment and satellites, gross | 11,811,284 | 11,440,273
Less: accumulated depreciation and amortization | (4,526,027) | (4,034,609)
Property and equipment, net | 7,285,257 | 7,405,664
Acquired intangible assets, net: |  |
Acquired intangible assets, gross | 2,879,380 | 2,904,049
Less: accumulated amortization | (752,484) | (633,272)
Acquired intangible assets, net | 2,126,896 | 2,270,777
Other assets: |  |
Deferred income taxes | 136,546 | 160,452
Capitalized software costs, net | 282,422 | 264,492
Patents, orbital slots and other licenses, net | 125,832 | 119,193
Other | 312,771 | 301,641
Other assets | 857,571 | 845,778
Accrued and other liabilities: |  |
Collections in excess of revenues and deferred revenues | 288,357 | 294,034
Accrued employee compensation | 110,021 | 185,556
Accrued vacation | 47,088 | 46,651
Operating lease liabilities | $ 67,591 | $ 65,310
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] | Accrued and other liabilities | Accrued and other liabilities
Interest payable | $ 50,008 | $ 52,183
Other | 251,035 | 264,795
Accrued and other liabilities | 814,100 | 908,529
Other liabilities: |  |
Deferred revenues, long-term portion | 777,631 | 786,710
Deferred income taxes | 963,978 | 1,069,717
Other | 307,781 | 324,726
Other liabilities | 2,049,390 | 2,181,153
Contracts and Customer Relationships [Member] |  |
Acquired intangible assets, net: |  |
Acquired intangible assets, gross | 1,433,184 | 1,432,562
Orbital Slots And Spectrum Assets [Member] |  |
Acquired intangible assets, net: |  |
Acquired intangible assets, gross | 1,088,600 | 1,088,600
Technology [Member] |  |
Acquired intangible assets, net: |  |
Acquired intangible assets, gross | 224,394 | 247,921
Trade Names [Member] |  |
Acquired intangible assets, net: |  |
Acquired intangible assets, gross | 114,587 | 116,949
Other [Member] |  |
Acquired intangible assets, net: |  |
Acquired intangible assets, gross | 18,615 | 18,017
Equipment and Software [Member] |  |
Property, equipment and satellites, net: |  |
Property, equipment and satellites, gross | 4,012,660 | 3,837,083
CPE Leased Equipment [Member] |  |
Property, equipment and satellites, net: |  |
Property, equipment and satellites, cost | 527,085 | 525,972
Furniture and Fixtures [Member] |  |
Property, equipment and satellites, net: |  |
Property, equipment and satellites, gross | 56,449 | 58,153
Leasehold Improvements [Member] |  |
Property, equipment and satellites, net: |  |
Property, equipment and satellites, gross | 318,656 | 313,249
Buildings [Member] |  |
Property, equipment and satellites, net: |  |
Property, equipment and satellites, gross | 15,388 | 15,388
Land [Member] |  |
Property, equipment and satellites, net: |  |
Property, equipment and satellites, gross | 19,661 | 19,661
Construction in Progress [Member] |  |
Property, equipment and satellites, net: |  |
Property, equipment and satellites, gross | 730,119 | 722,194
Satellites [Member] |  |
Property, equipment and satellites, net: |  |
Property, equipment and satellites, gross | 3,412,688 | 3,405,067
Satellite Ka-band Capacity Obtained under Finance Leases [Member] |  |
Property, equipment and satellites, net: |  |
Property, equipment and satellites, gross | 338,201 | 338,201
Satellites under Construction [Member] |  |
Property, equipment and satellites, net: |  |
Property, equipment and satellites, gross | $ 2,380,377 | $ 2,205,305

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