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Composition of Certain Balance Sheet Captions - Composition of Certain Balance Sheet Captions (Detail) - USD ($) $ in Thousands | Dec. 31, 2024 | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | --- | ---
Accounts receivable, net: |  |  |
Accounts receivable, Billed | $ 533,997 | $ 545,081 |
Accounts receivable, Unbilled | 137,851 | 156,322 |
Allowance for doubtful accounts | (22,886) | (23,193) |
Accounts receivable, net | 648,962 | 678,210 |
Inventories: |  |  |
Raw materials | 110,583 | 89,778 |
Work in process | 23,228 | 31,884 |
Finished goods | 186,326 | 196,216 |
Inventories | 320,137 | 317,878 |
Prepaid expenses and other current assets: |  |  |
Insurance receivable | 21,500 | 261,500 |
Prepaid expenses | 177,985 | 185,892 |
Other | 116,527 | 134,391 |
Prepaid expenses and other current assets | 316,012 | 581,783 |
Property, equipment and satellites, net: |  |  |
Property, equipment and satellites, gross | 11,349,310 | 10,651,781 |
Less: accumulated depreciation and amortization | (3,793,786) | (3,094,575) |
Property and equipment, net | 7,555,524 | 7,557,206 |
Other acquired intangible assets, net: |  |  |
Other acquired intangible assets, gross | 2,903,721 | 2,917,299 |
Less: accumulated amortization | (565,633) | (372,832) |
Other acquired intangible assets, net | 2,338,088 | 2,544,467 |
Other assets: |  |  |
Deferred income taxes | 165,023 | 163,590 |
Capitalized software costs, net | 253,793 | 240,597 |
Patents, orbital slots and other licenses, net | 119,085 | 112,535 |
Other | 284,950 | 217,225 |
Other assets | 822,851 | 733,947 |
Accrued and other liabilities: |  |  |
Collections in excess of revenues and deferred revenues | 307,671 | 260,264 |
Accrued employee compensation | 140,407 | 177,854 |
Accrued vacation | 44,045 | 48,636 |
Operating lease liabilities | $ 61,100 | $ 71,561 |
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] | Accrued and other liabilities | Accrued and other liabilities |
Interest payable | $ 82,064 | $ 127,098 |
Other | 219,613 | 265,208 |
Accrued and other liabilities | 854,900 | 950,621 |
Other liabilities: |  |  |
Deferred revenues, long-term portion | 799,565 | 896,402 |
Deferred income taxes, long-term | 1,112,063 | 1,228,270 |
Other | 314,600 | 327,428 |
Other liabilities | 2,226,228 | 2,452,100 |
Contracts and Customer Relationships [Member] |  |  |
Other acquired intangible assets, net: |  |  |
Other acquired intangible assets, gross | 1,430,971 | 1,437,738 |
Orbital Slots And Spectrum Assets [Member] |  |  |
Other acquired intangible assets, net: |  |  |
Other acquired intangible assets, gross | 1,088,600 | 1,088,600 |
Technology [Member] |  |  |
Other acquired intangible assets, net: |  |  |
Other acquired intangible assets, gross | 245,877 | 251,889 |
Trade Name [Member] |  |  |
Other acquired intangible assets, net: |  |  |
Other acquired intangible assets, gross | 116,733 | 117,280 |
Other [Member] |  |  |
Other acquired intangible assets, net: |  |  |
Other acquired intangible assets, gross | 21,540 | 21,792 |
Satellites [Member] |  |  |
Prepaid expenses and other current assets: |  |  |
Insurance receivable |  |  | $ 770,000
Property, equipment and satellites, net: |  |  |
Property, equipment and satellites, gross | 3,401,744 | 3,324,458 |
Satellites under Construction [Member] |  |  |
Property, equipment and satellites, net: |  |  |
Property, equipment and satellites, gross | 2,129,428 | 1,976,469 |
Equipment and Software [Member] |  |  |
Property, equipment and satellites, net: |  |  |
Property, equipment and satellites, gross | 3,634,930 | 2,992,325 |
CPE Leased Equipment [Member] |  |  |
Property, equipment and satellites, net: |  |  |
Property, equipment and satellites, cost | 534,777 | 567,548 |
Satellite Ka-band Capacity Obtained under Finance Leases [Member] |  |  |
Property, equipment and satellites, net: |  |  |
Property, equipment and satellites, gross | 338,201 | 177,576 |
Furniture and Fixtures [Member] |  |  |
Property, equipment and satellites, net: |  |  |
Property, equipment and satellites, gross | 62,077 | 65,433 |
Leasehold Improvements [Member] |  |  |
Property, equipment and satellites, net: |  |  |
Property, equipment and satellites, gross | 309,755 | 209,162 |
Buildings [Member] |  |  |
Property, equipment and satellites, net: |  |  |
Property, equipment and satellites, gross | 15,388 | 16,647 |
Land [Member] |  |  |
Property, equipment and satellites, net: |  |  |
Property, equipment and satellites, gross | 19,661 | 20,787 |
Construction in Progress [Member] |  |  |
Property, equipment and satellites, net: |  |  |
Property, equipment and satellites, gross | $ 903,349 | $ 1,301,376 |

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